# 500 error when adding a Language Tag (Multilingual Plugin) to a user's post
**URL:** https://meta.discourse.org/t/500-error-when-adding-a-language-tag-multilingual-plugin-to-a-users-post/361964
**Category:** Bug
**Tags:** activitypub
**Created:** [April 15, 2025, 8:19pm UTC](https://meta.discourse.org/t/500-error-when-adding-a-language-tag-multilingual-plugin-to-a-users-post/361964 "2025-04-15T20:19:59Z")
**Posts on this page:** 9
**Page:** 1
### Author:  [@joshhabka](https://meta.discourse.org/u/joshhabka)
#### Post date: [April 15, 2025, 8:19pm UTC](https://meta.discourse.org/t/500-error-when-adding-a-language-tag-multilingual-plugin-to-a-users-post/361964/1 "2025-04-15T20:19:59Z")
I have both the Multilingual and Discourse Translator plugins installed. I tried to go to someone’s post, click edit, and add a language tag(as when someone sets their user language preferences, no posts show(unless explicitly tagged with the respective language)).
Upon saving the edit, it shows “500 error” Here is the respective console error:
```plaintext
ajax.js:188
PUT https://biohacking.forum/t/does-anybody-here-use-peptides/953 500 (Internal Server Error)
ajax-error.js:35 SyntaxError: Unexpected token '<', ")
at l (ajax-error.js:31:20)
at u (ajax-error.js:74:10)
at ajax-error.js:83:11
at push.57313.D.t.error (ajax.js:163:7)
deprecated.js:62 [PLUGIN discourse-multilingual] Deprecation notice: Importing getOwner from `discourse/lib/get-owner` is deprecated. See the alternatives on meta. [deprecated since Discourse 3.2] [deprecation id: discourse.get-owner-with-fallback] [info: https://meta.discourse.org/t/292080]
```
Has anyone else encountered this error? Thanks!
---
### Author:  [@jumagura](https://meta.discourse.org/u/jumagura)
#### Post date: [April 16, 2025, 2:07pm UTC](https://meta.discourse.org/t/500-error-when-adding-a-language-tag-multilingual-plugin-to-a-users-post/361964/3 "2025-04-16T14:07:05Z")
Thanks for the report. I’m currently working on reproduce and fix that issue.
---
### Author:  [@joshhabka](https://meta.discourse.org/u/joshhabka)
#### Post date: [April 16, 2025, 5:49pm UTC](https://meta.discourse.org/t/500-error-when-adding-a-language-tag-multilingual-plugin-to-a-users-post/361964/4 "2025-04-16T17:49:40Z")
Thank you for looking into it, I would love to re-install the plugin once this is fixed!
Here is my website link: [https://biohacking.forum](https://biohacking.forum)
---
### Author:  [@Moin](https://meta.discourse.org/u/Moin)
#### Post date: [May 8, 2025, 11:42am UTC](https://meta.discourse.org/t/500-error-when-adding-a-language-tag-multilingual-plugin-to-a-users-post/361964/5 "2025-05-08T11:42:12Z")
> [@joshhabka](#):
>
> Has anyone else encountered this error?
Yes 🙋♀️.
I got the same error when I edited the spelling mistake in the title of [AI icon for title and tag helper is positioned above the similar topic modal](https://meta.discourse.org/t/ai-icon-for-title-and-tag-helper-is-positioned-above-the-similar-topic-modal/341377). It showed the error, but after reloading, the title was changed.
I get the same error when I edit the title of [Disable ai title generator when pm title cannot be edited](https://meta.discourse.org/t/disable-ai-title-generator-when-pm-title-cannot-be-edited/307595), but I don’t get it when I edit the title of [Ai icon for category helper is positioned above the + menu](https://meta.discourse.org/t/ai-icon-for-category-helper-is-positioned-above-the-menu/363692).
Maybe the error occurs when you edit the title/tags of topics that aren’t published via ActivityPub but are tagged with a federated tag.
---
### Author:  [@JammyDodger](https://meta.discourse.org/u/JammyDodger)
#### Post date: [May 9, 2025, 7:33am UTC](https://meta.discourse.org/t/500-error-when-adding-a-language-tag-multilingual-plugin-to-a-users-post/361964/6 "2025-05-09T07:33:30Z")
> [@Moin](#):
>
> Maybe the error occurs when you edit the title/tags of topics that aren’t published via ActivityPub but are tagged with a federated tag.
I think I can repro this. My basic step-by-step:
- Enable ActivityPub
- Create a tag actor for an existing tag
- Attempt to edit the title of an existing topic with that tag
Result: Error 500 warning, though edit does go through
Record in `/logs`:
```plaintext
Message
NoMethodError (undefined method `name=' for nil)
lib/plugin/instance.rb:614:in `block in on'
lib/discourse_event.rb:12:in `block in trigger'
lib/discourse_event.rb:12:in `trigger'
lib/post_revisor.rb:720:in `post_process_post'
lib/post_revisor.rb:326:in `revise!'
app/controllers/topics_controller.rb:449:in `update'
app/controllers/application_controller.rb:427:in `block in with_resolved_locale'
app/controllers/application_controller.rb:427:in `with_resolved_locale'
lib/middleware/omniauth_bypass_middleware.rb:35:in `call'
lib/content_security_policy/middleware.rb:12:in `call'
lib/middleware/anonymous_cache.rb:410:in `call'
lib/middleware/csp_script_nonce_injector.rb:12:in `call'
config/initializers/008-rack-cors.rb:14:in `call'
lib/middleware/default_headers.rb:13:in `call'
config/initializers/100-quiet_logger.rb:20:in `call'
config/initializers/100-silence_logger.rb:29:in `call'
lib/middleware/enforce_hostname.rb:24:in `call'
lib/middleware/processing_request.rb:12:in `call'
lib/middleware/request_tracker.rb:385:in `call'
Backtrace
plugins/discourse-activity-pub/plugin.rb:760:in `block (2 levels) in activate!'
lib/plugin/instance.rb:614:in `block in on'
lib/discourse_event.rb:12:in `block in trigger'
/usr/local/lib/ruby/3.3.0/set.rb:501:in `each_key'
/usr/local/lib/ruby/3.3.0/set.rb:501:in `each'
lib/discourse_event.rb:12:in `trigger'
lib/post_revisor.rb:720:in `post_process_post'
lib/post_revisor.rb:326:in `revise!'
app/controllers/topics_controller.rb:449:in `update'
plugins/discourse-encrypt/lib/topics_controller_extensions.rb:20:in `update'
actionpack (7.2.2.1) lib/action_controller/metal/basic_implicit_render.rb:8:in `send_action'
actionpack (7.2.2.1) lib/abstract_controller/base.rb:226:in `process_action'
actionpack (7.2.2.1) lib/action_controller/metal/rendering.rb:193:in `process_action'
actionpack (7.2.2.1) lib/abstract_controller/callbacks.rb:261:in `block in process_action'
activesupport (7.2.2.1) lib/active_support/callbacks.rb:121:in `block in run_callbacks'
plugins/discourse-staff-alias/lib/discourse_staff_alias/topics_controller_extension.rb:22:in `block (2 levels) in '
activesupport (7.2.2.1) lib/active_support/callbacks.rb:130:in `instance_exec'
activesupport (7.2.2.1) lib/active_support/callbacks.rb:130:in `block in run_callbacks'
app/controllers/application_controller.rb:427:in `block in with_resolved_locale'
i18n (1.14.7) lib/i18n.rb:353:in `with_locale'
app/controllers/application_controller.rb:427:in `with_resolved_locale'
activesupport (7.2.2.1) lib/active_support/callbacks.rb:130:in `block in run_callbacks'
activesupport (7.2.2.1) lib/active_support/callbacks.rb:141:in `run_callbacks'
actionpack (7.2.2.1) lib/abstract_controller/callbacks.rb:260:in `process_action'
actionpack (7.2.2.1) lib/action_controller/metal/rescue.rb:27:in `process_action'
actionpack (7.2.2.1) lib/action_controller/metal/instrumentation.rb:77:in `block in process_action'
activesupport (7.2.2.1) lib/active_support/notifications.rb:210:in `block in instrument'
activesupport (7.2.2.1) lib/active_support/notifications/instrumenter.rb:58:in `instrument'
activesupport (7.2.2.1) lib/active_support/notifications.rb:210:in `instrument'
actionpack (7.2.2.1) lib/action_controller/metal/instrumentation.rb:76:in `process_action'
actionpack (7.2.2.1) lib/action_controller/metal/params_wrapper.rb:259:in `process_action'
activerecord (7.2.2.1) lib/active_record/railties/controller_runtime.rb:39:in `process_action'
actionpack (7.2.2.1) lib/abstract_controller/base.rb:163:in `process'
actionview (7.2.2.1) lib/action_view/rendering.rb:40:in `process'
rack-mini-profiler (3.3.1) lib/mini_profiler/profiling_methods.rb:89:in `block in profile_method'
actionpack (7.2.2.1) lib/action_controller/metal.rb:252:in `dispatch'
actionpack (7.2.2.1) lib/action_controller/metal.rb:335:in `dispatch'
actionpack (7.2.2.1) lib/action_dispatch/routing/route_set.rb:67:in `dispatch'
actionpack (7.2.2.1) lib/action_dispatch/routing/route_set.rb:50:in `serve'
actionpack (7.2.2.1) lib/action_dispatch/journey/router.rb:53:in `block in serve'
actionpack (7.2.2.1) lib/action_dispatch/journey/router.rb:133:in `block in find_routes'
actionpack (7.2.2.1) lib/action_dispatch/journey/router.rb:126:in `each'
actionpack (7.2.2.1) lib/action_dispatch/journey/router.rb:126:in `find_routes'
actionpack (7.2.2.1) lib/action_dispatch/journey/router.rb:34:in `serve'
actionpack (7.2.2.1) lib/action_dispatch/routing/route_set.rb:896:in `call'
lib/middleware/omniauth_bypass_middleware.rb:35:in `call'
rack (2.2.13) lib/rack/tempfile_reaper.rb:15:in `call'
rack (2.2.13) lib/rack/conditional_get.rb:40:in `call'
rack (2.2.13) lib/rack/head.rb:12:in `call'
actionpack (7.2.2.1) lib/action_dispatch/http/permissions_policy.rb:38:in `call'
lib/content_security_policy/middleware.rb:12:in `call'
lib/middleware/anonymous_cache.rb:410:in `call'
lib/middleware/csp_script_nonce_injector.rb:12:in `call'
config/initializers/008-rack-cors.rb:14:in `call'
rack (2.2.13) lib/rack/session/abstract/id.rb:266:in `context'
rack (2.2.13) lib/rack/session/abstract/id.rb:260:in `call'
actionpack (7.2.2.1) lib/action_dispatch/middleware/cookies.rb:704:in `call'
actionpack (7.2.2.1) lib/action_dispatch/middleware/callbacks.rb:31:in `block in call'
activesupport (7.2.2.1) lib/active_support/callbacks.rb:101:in `run_callbacks'
actionpack (7.2.2.1) lib/action_dispatch/middleware/callbacks.rb:30:in `call'
actionpack (7.2.2.1) lib/action_dispatch/middleware/debug_exceptions.rb:31:in `call'
actionpack (7.2.2.1) lib/action_dispatch/middleware/show_exceptions.rb:32:in `call'
logster (2.20.1) lib/logster/middleware/reporter.rb:40:in `call'
lib/middleware/default_headers.rb:13:in `call'
railties (7.2.2.1) lib/rails/rack/logger.rb:41:in `call_app'
railties (7.2.2.1) lib/rails/rack/logger.rb:29:in `call'
config/initializers/100-quiet_logger.rb:20:in `call'
config/initializers/100-silence_logger.rb:29:in `call'
actionpack (7.2.2.1) lib/action_dispatch/middleware/request_id.rb:33:in `call'
lib/middleware/enforce_hostname.rb:24:in `call'
rack (2.2.13) lib/rack/method_override.rb:24:in `call'
actionpack (7.2.2.1) lib/action_dispatch/middleware/executor.rb:16:in `call'
rack (2.2.13) lib/rack/sendfile.rb:110:in `call'
rack-mini-profiler (3.3.1) lib/mini_profiler.rb:191:in `call'
lib/middleware/processing_request.rb:12:in `call'
message_bus (4.4.1) lib/message_bus/rack/middleware.rb:60:in `call'
lib/middleware/request_tracker.rb:385:in `call'
actionpack (7.2.2.1) lib/action_dispatch/middleware/remote_ip.rb:96:in `call'
railties (7.2.2.1) lib/rails/engine.rb:535:in `call'
railties (7.2.2.1) lib/rails/railtie.rb:226:in `public_send'
railties (7.2.2.1) lib/rails/railtie.rb:226:in `method_missing'
rack (2.2.13) lib/rack/urlmap.rb:74:in `block in call'
rack (2.2.13) lib/rack/urlmap.rb:58:in `each'
rack (2.2.13) lib/rack/urlmap.rb:58:in `call'
unicorn (6.1.0) lib/unicorn/http_server.rb:634:in `process_client'
unicorn (6.1.0) lib/unicorn/http_server.rb:739:in `worker_loop'
unicorn (6.1.0) lib/unicorn/http_server.rb:547:in `spawn_missing_workers'
unicorn (6.1.0) lib/unicorn/http_server.rb:143:in `start'
unicorn (6.1.0) bin/unicorn:128:in `'
vendor/bundle/ruby/3.3.0/bin/unicorn:25:in `load'
vendor/bundle/ruby/3.3.0/bin/unicorn:25:in `'
```
---
### Author:  [@RGJ](https://meta.discourse.org/u/RGJ)
#### Post date: [May 9, 2025, 8:55am UTC](https://meta.discourse.org/t/500-error-when-adding-a-language-tag-multilingual-plugin-to-a-users-post/361964/7 "2025-05-09T08:55:18Z")
> [@JammyDodger](#):
>
> `plugins/discourse-encrypt/`
🤔
---
### Author:  [@JammyDodger](https://meta.discourse.org/u/JammyDodger)
#### Post date: [May 9, 2025, 8:58am UTC](https://meta.discourse.org/t/500-error-when-adding-a-language-tag-multilingual-plugin-to-a-users-post/361964/8 "2025-05-09T08:58:52Z")
Hmm, yes. I think I have some tidying up to do…
Staff alias is poking its nose in too.
* * *
I have removed the deprecated Encrypt plugin 🥳
Still the same issue, but here’s the fresh one from the log:
```plaintext
Message
NoMethodError (undefined method `name=' for nil)
lib/plugin/instance.rb:614:in `block in on'
lib/discourse_event.rb:12:in `block in trigger'
lib/discourse_event.rb:12:in `trigger'
lib/post_revisor.rb:720:in `post_process_post'
lib/post_revisor.rb:326:in `revise!'
app/controllers/topics_controller.rb:449:in `update'
app/controllers/application_controller.rb:427:in `block in with_resolved_locale'
app/controllers/application_controller.rb:427:in `with_resolved_locale'
lib/middleware/omniauth_bypass_middleware.rb:35:in `call'
lib/content_security_policy/middleware.rb:12:in `call'
lib/middleware/anonymous_cache.rb:415:in `call'
lib/middleware/csp_script_nonce_injector.rb:12:in `call'
config/initializers/008-rack-cors.rb:14:in `call'
lib/middleware/default_headers.rb:13:in `call'
config/initializers/100-quiet_logger.rb:20:in `call'
config/initializers/100-silence_logger.rb:29:in `call'
lib/middleware/enforce_hostname.rb:24:in `call'
lib/middleware/processing_request.rb:12:in `call'
lib/middleware/request_tracker.rb:385:in `call'
Backtrace
plugins/discourse-activity-pub/plugin.rb:780:in `block (2 levels) in activate!'
lib/plugin/instance.rb:614:in `block in on'
lib/discourse_event.rb:12:in `block in trigger'
/usr/local/lib/ruby/3.3.0/set.rb:501:in `each_key'
/usr/local/lib/ruby/3.3.0/set.rb:501:in `each'
lib/discourse_event.rb:12:in `trigger'
lib/post_revisor.rb:720:in `post_process_post'
lib/post_revisor.rb:326:in `revise!'
app/controllers/topics_controller.rb:449:in `update'
actionpack (7.2.2.1) lib/action_controller/metal/basic_implicit_render.rb:8:in `send_action'
actionpack (7.2.2.1) lib/abstract_controller/base.rb:226:in `process_action'
actionpack (7.2.2.1) lib/action_controller/metal/rendering.rb:193:in `process_action'
actionpack (7.2.2.1) lib/abstract_controller/callbacks.rb:261:in `block in process_action'
activesupport (7.2.2.1) lib/active_support/callbacks.rb:121:in `block in run_callbacks'
plugins/discourse-staff-alias/lib/discourse_staff_alias/topics_controller_extension.rb:22:in `block (2 levels) in '
activesupport (7.2.2.1) lib/active_support/callbacks.rb:130:in `instance_exec'
activesupport (7.2.2.1) lib/active_support/callbacks.rb:130:in `block in run_callbacks'
app/controllers/application_controller.rb:427:in `block in with_resolved_locale'
i18n (1.14.7) lib/i18n.rb:353:in `with_locale'
app/controllers/application_controller.rb:427:in `with_resolved_locale'
activesupport (7.2.2.1) lib/active_support/callbacks.rb:130:in `block in run_callbacks'
activesupport (7.2.2.1) lib/active_support/callbacks.rb:141:in `run_callbacks'
actionpack (7.2.2.1) lib/abstract_controller/callbacks.rb:260:in `process_action'
actionpack (7.2.2.1) lib/action_controller/metal/rescue.rb:27:in `process_action'
actionpack (7.2.2.1) lib/action_controller/metal/instrumentation.rb:77:in `block in process_action'
activesupport (7.2.2.1) lib/active_support/notifications.rb:210:in `block in instrument'
activesupport (7.2.2.1) lib/active_support/notifications/instrumenter.rb:58:in `instrument'
activesupport (7.2.2.1) lib/active_support/notifications.rb:210:in `instrument'
actionpack (7.2.2.1) lib/action_controller/metal/instrumentation.rb:76:in `process_action'
actionpack (7.2.2.1) lib/action_controller/metal/params_wrapper.rb:259:in `process_action'
activerecord (7.2.2.1) lib/active_record/railties/controller_runtime.rb:39:in `process_action'
actionpack (7.2.2.1) lib/abstract_controller/base.rb:163:in `process'
actionview (7.2.2.1) lib/action_view/rendering.rb:40:in `process'
rack-mini-profiler (3.3.1) lib/mini_profiler/profiling_methods.rb:115:in `block in profile_method'
actionpack (7.2.2.1) lib/action_controller/metal.rb:252:in `dispatch'
actionpack (7.2.2.1) lib/action_controller/metal.rb:335:in `dispatch'
actionpack (7.2.2.1) lib/action_dispatch/routing/route_set.rb:67:in `dispatch'
actionpack (7.2.2.1) lib/action_dispatch/routing/route_set.rb:50:in `serve'
actionpack (7.2.2.1) lib/action_dispatch/journey/router.rb:53:in `block in serve'
actionpack (7.2.2.1) lib/action_dispatch/journey/router.rb:133:in `block in find_routes'
actionpack (7.2.2.1) lib/action_dispatch/journey/router.rb:126:in `each'
actionpack (7.2.2.1) lib/action_dispatch/journey/router.rb:126:in `find_routes'
actionpack (7.2.2.1) lib/action_dispatch/journey/router.rb:34:in `serve'
actionpack (7.2.2.1) lib/action_dispatch/routing/route_set.rb:896:in `call'
lib/middleware/omniauth_bypass_middleware.rb:35:in `call'
rack (2.2.13) lib/rack/tempfile_reaper.rb:15:in `call'
rack (2.2.13) lib/rack/conditional_get.rb:40:in `call'
rack (2.2.13) lib/rack/head.rb:12:in `call'
actionpack (7.2.2.1) lib/action_dispatch/http/permissions_policy.rb:38:in `call'
lib/content_security_policy/middleware.rb:12:in `call'
lib/middleware/anonymous_cache.rb:415:in `call'
lib/middleware/csp_script_nonce_injector.rb:12:in `call'
config/initializers/008-rack-cors.rb:14:in `call'
rack (2.2.13) lib/rack/session/abstract/id.rb:266:in `context'
rack (2.2.13) lib/rack/session/abstract/id.rb:260:in `call'
actionpack (7.2.2.1) lib/action_dispatch/middleware/cookies.rb:704:in `call'
actionpack (7.2.2.1) lib/action_dispatch/middleware/callbacks.rb:31:in `block in call'
activesupport (7.2.2.1) lib/active_support/callbacks.rb:101:in `run_callbacks'
actionpack (7.2.2.1) lib/action_dispatch/middleware/callbacks.rb:30:in `call'
actionpack (7.2.2.1) lib/action_dispatch/middleware/debug_exceptions.rb:31:in `call'
actionpack (7.2.2.1) lib/action_dispatch/middleware/show_exceptions.rb:32:in `call'
logster (2.20.1) lib/logster/middleware/reporter.rb:40:in `call'
lib/middleware/default_headers.rb:13:in `call'
railties (7.2.2.1) lib/rails/rack/logger.rb:41:in `call_app'
railties (7.2.2.1) lib/rails/rack/logger.rb:29:in `call'
config/initializers/100-quiet_logger.rb:20:in `call'
config/initializers/100-silence_logger.rb:29:in `call'
actionpack (7.2.2.1) lib/action_dispatch/middleware/request_id.rb:33:in `call'
lib/middleware/enforce_hostname.rb:24:in `call'
rack (2.2.13) lib/rack/method_override.rb:24:in `call'
actionpack (7.2.2.1) lib/action_dispatch/middleware/executor.rb:16:in `call'
rack (2.2.13) lib/rack/sendfile.rb:110:in `call'
rack-mini-profiler (3.3.1) lib/mini_profiler.rb:334:in `call'
lib/middleware/processing_request.rb:12:in `call'
message_bus (4.4.1) lib/message_bus/rack/middleware.rb:60:in `call'
lib/middleware/request_tracker.rb:385:in `call'
actionpack (7.2.2.1) lib/action_dispatch/middleware/remote_ip.rb:96:in `call'
railties (7.2.2.1) lib/rails/engine.rb:535:in `call'
railties (7.2.2.1) lib/rails/railtie.rb:226:in `public_send'
railties (7.2.2.1) lib/rails/railtie.rb:226:in `method_missing'
rack (2.2.13) lib/rack/urlmap.rb:74:in `block in call'
rack (2.2.13) lib/rack/urlmap.rb:58:in `each'
rack (2.2.13) lib/rack/urlmap.rb:58:in `call'
unicorn (6.1.0) lib/unicorn/http_server.rb:634:in `process_client'
unicorn (6.1.0) lib/unicorn/http_server.rb:739:in `worker_loop'
unicorn (6.1.0) lib/unicorn/http_server.rb:547:in `spawn_missing_workers'
unicorn (6.1.0) lib/unicorn/http_server.rb:143:in `start'
unicorn (6.1.0) bin/unicorn:128:in `'
vendor/bundle/ruby/3.3.0/bin/unicorn:25:in `load'
vendor/bundle/ruby/3.3.0/bin/unicorn:25:in `'
```
(Staff Alias is still installed, but disabled. If it’s important I can rebuild without it)
---
### Author:  [@JammyDodger](https://meta.discourse.org/u/JammyDodger)
#### Post date: [May 13, 2025, 9:25am UTC](https://meta.discourse.org/t/500-error-when-adding-a-language-tag-multilingual-plugin-to-a-users-post/361964/9 "2025-05-13T09:25:28Z")
Just to check in @joshhabka, do you also see something in `YourSite/logs` that matches the ActivityPub issue?
Just want to make sure this is the same issue and not two different ones. 🙂
---
### Author:  [@Moin](https://meta.discourse.org/u/Moin)
#### Post date: [August 4, 2025, 2:45pm UTC](https://meta.discourse.org/t/500-error-when-adding-a-language-tag-multilingual-plugin-to-a-users-post/361964/10 "2025-08-04T14:45:32Z")
> [@Moin](#):
>
> I got the same error when I edited the spelling mistake in the title of [Ai icon for title and tag helper is positioned above the similar topic modal](https://meta.discourse.org/t/ai-icon-for-title-and-tag-helper-is-positioned-above-the-similar-topic-modal/341377). It showed the error, but after reloading, the title was changed.
This one should be fixed by [FIX: Allow topic title editing for non-ActivityPub posts by pmusaraj · Pull Request #235 · discourse/discourse-activity-pub · GitHub](https://github.com/discourse/discourse-activity-pub/pull/235)
Edit: It is 🥳
> [@Moin](#):
>
> I get the same error when I edit the title of [Disable ai title generator when pm title cannot be edited](https://meta.discourse.org/t/disable-ai-title-generator-when-pm-title-cannot-be-edited/307595)
No more error here either when I edit the title