A user recently reported that a thread on my site started returning an Internal Server Error last night. The thread is in Q&A format, but besides that it’s normal. I dont know what’s causing this. There’s another Q&A topic here which works fine.

Check the /logs page for the backtrace of the error 500.

I see this. 35 Deprecation notice: `SiteSetting.secure_media` has been deprecated. Please use `SiteSetting.secure_uploads` instead. (removal in Discourse 3.0) At /var/www/discourse/lib/site_setting_extension.rb:211 11 NoMethodError (undefined method `name' for nil:NilClass) (eval):5:in `_fast_attributes' (eval):90:in `_fast_attributes' app/serializers/post_stream_serializer_mixin.rb:53:in `block in posts' app/seria 2:16 pm plugins/discourse-question-answer/app/serializers/question_answer_comment_serializer.rb:17:in `name' (eval):5:in `_fast_attributes' active_model_serializers (0.8.4) lib/active_model/serializer.rb:468:in `rescue in attributes' active_model_serializers (0.8.4) lib/active_model/serializer.rb:455:in `attributes' active_model_serializers (0.8.4) lib/active_model/serializer.rb:480:in `_serializable_hash' active_model_serializers (0.8.4) lib/active_model/serializer.rb:359:in `serializable_hash' active_model_serializers (0.8.4) lib/active_model/serializer.rb:347:in `as_json' plugins/discourse-question-answer/extensions/post_serializer_extension.rb:27:in `block in comments' plugins/discourse-question-answer/extensions/post_serializer_extension.rb:24:in `map' plugins/discourse-question-answer/extensions/post_serializer_extension.rb:24:in `comments' (eval):90:in `_fast_attributes' active_model_serializers (0.8.4) lib/active_model/serializer.rb:468:in `rescue in attributes' active_model_serializers (0.8.4) lib/active_model/serializer.rb:455:in `attributes' active_model_serializers (0.8.4) lib/active_model/serializer.rb:480:in `_serializable_hash' active_model_serializers (0.8.4) lib/active_model/serializer.rb:359:in `serializable_hash' active_model_serializers (0.8.4) lib/active_model/serializer.rb:347:in `as_json' app/serializers/post_stream_serializer_mixin.rb:53:in `block in posts' activerecord (7.0.3.1) lib/active_record/relation/delegation.rb:88:in `each' activerecord (7.0.3.1) lib/active_record/relation/delegation.rb:88:in `each' app/serializers/post_stream_serializer_mixin.rb:46:in `map' app/serializers/post_stream_serializer_mixin.rb:46:in `posts' plugins/discourse-reactions/lib/discourse_reactions/topic_view_serializer_extension.rb:17:in `posts' app/serializers/post_stream_serializer_mixin.rb:18:in `post_stream' (eval):3:in `_fast_attributes' active_model_serializers (0.8.4) lib/active_model/serializer.rb:468:in `rescue in attributes' active_model_serializers (0.8.4) lib/active_model/serializer.rb:455:in `attributes' active_model_serializers (0.8.4) lib/active_model/serializer.rb:480:in `_serializable_hash' active_model_serializers (0.8.4) lib/active_model/serializer.rb:359:in `serializable_hash' active_model_serializers (0.8.4) lib/active_model/serializer.rb:347:in `as_json' activesupport (7.0.3.1) lib/active_support/json/encoding.rb:22:in `encode' activesupport (7.0.3.1) lib/active_support/json/encoding.rb:22:in `encode' activesupport (7.0.3.1) lib/active_support/core_ext/object/json.rb:42:in `to_json' active_model_serializers (0.8.4) lib/active_model/serializer.rb:331:in `to_json' multi_json (1.15.0) lib/multi_json/adapters/oj.rb:56:in `dump' multi_json (1.15.0) lib/multi_json/adapters/oj.rb:56:in `dump' multi_json (1.15.0) lib/multi_json/adapter.rb:25:in `dump' multi_json (1.15.0) lib/multi_json.rb:139:in `dump' app/controllers/topics_controller.rb:1199:in `block (2 levels) in perform_show_response' actionpack (7.0.3.1) lib/action_controller/metal/mime_responds.rb:214:in `respond_to' app/controllers/topics_controller.rb:1194:in `perform_show_response' app/controllers/topics_controller.rb:169:in `show' actionpack (7.0.3.1) lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action' actionpack (7.0.3.1) lib/abstract_controller/base.rb:215:in `process_action' actionpack (7.0.3.1) lib/action_controller/metal/rendering.rb:53:in `process_action' actionpack (7.0.3.1) lib/abstract_controller/callbacks.rb:234:in `block in process_action' activesupport (7.0.3.1) lib/active_support/callbacks.rb:118:in `block in run_callbacks' app/controllers/application_controller.rb:413:in `block in with_resolved_locale' i18n (1.12.0) lib/i18n.rb:322:in `with_locale' app/controllers/application_controller.rb:413:in `with_resolved_locale' activesupport (7.0.3.1) lib/active_support/callbacks.rb:127:in `block in run_callbacks' activesupport (7.0.3.1) lib/active_support/callbacks.rb:138:in `run_callbacks' actionpack (7.0.3.1) lib/abstract_controller/callbacks.rb:233:in `process_action' actionpack (7.0.3.1) lib/action_controller/metal/rescue.rb:22:in `process_action' actionpack (7.0.3.1) lib/action_controller/metal/instrumentation.rb:67:in `block in process_action' activesupport (7.0.3.1) lib/active_support/notifications.rb:206:in `block in instrument' activesupport (7.0.3.1) lib/active_support/notifications/instrumenter.rb:24:in `instrument' activesupport (7.0.3.1) lib/active_support/notifications.rb:206:in `instrument' actionpack (7.0.3.1) lib/action_controller/metal/instrumentation.rb:66:in `process_action' actionpack (7.0.3.1) lib/action_controller/metal/params_wrapper.rb:259:in `process_action' activerecord (7.0.3.1) lib/active_record/railties/controller_runtime.rb:27:in `process_action' actionpack (7.0.3.1) lib/abstract_controller/base.rb:151:in `process' actionview (7.0.3.1) lib/action_view/rendering.rb:39:in `process' rack-mini-profiler (3.0.0) lib/mini_profiler/profiling_methods.rb:85:in `block in profile_method' actionpack (7.0.3.1) lib/action_controller/metal.rb:188:in `dispatch' actionpack (7.0.3.1) lib/action_controller/metal.rb:251:in `dispatch' actionpack (7.0.3.1) lib/action_dispatch/routing/route_set.rb:49:in `dispatch' actionpack (7.0.3.1) lib/action_dispatch/routing/route_set.rb:32:in `serve' actionpack (7.0.3.1) lib/action_dispatch/journey/router.rb:50:in `block in serve' actionpack (7.0.3.1) lib/action_dispatch/journey/router.rb:32:in `each' actionpack (7.0.3.1) lib/action_dispatch/journey/router.rb:32:in `serve' actionpack (7.0.3.1) lib/action_dispatch/routing/route_set.rb:852:in `call' 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[image] Pyx : plugins/discourse-question-answer/app/serializers/question_answer_comment_serializer.rb:17:in `name' That looks like a bug in the discourse-question-answer plugin. I think if you remove that plugin (or perhaps use safe mode) that error will go away.

There was an issue recently where having the old discourse-feature-voting git along with post-voting in your app.yml would cause error 500 for the whole site. This is slightly different though, but may still be worth a check? If so, could you try updating your app.yml with the discourse-topic-voting and discourse-post-voting links and see if that helps?

500 Error when loading a specific topic

Product Support

darkpixlz (Pyx ) December 5, 2022, 1:37pm 6

Yeah, I kinda forgot about this topic.

I’ll check that out.

Topic		Replies	Views
User can't post: 500 internal server error Product Support	10	1631	April 18, 2018
Get oops 500 error when installing question answer plugin Bug post-voting	5	1072	November 20, 2022
The discourse stopped working with error 500 Internal Server Error Bug	1	3164	March 7, 2017
500 Error While Posting a Topic Bug	15	1049	August 5, 2020
Polls disabled caused 500 error Product Support	9	843	July 26, 2018

500 Error when loading a specific topic

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