# Undefined method \`sub!' when visiting \`/admin/upgrade\`

**URL:** <https://meta.discourse.org/t/undefined-method-sub-when-visiting-admin-upgrade/274682>\
**Category:** Self-hosting\
**Created:** [August 10, 2023, 2:17pm UTC](https://meta.discourse.org/t/undefined-method-sub-when-visiting-admin-upgrade/274682 "2023-08-10T14:17:24Z")\
**Posts on this page:** 1\
**Showing post:** 3

<div class="post-metadata">

**Author:** ![kdambekalns](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/kdambekalns/32/120408_2.png) [@kdambekalns](https://meta.discourse.org/u/kdambekalns)\
**Post date:** [August 10, 2023, 3:26pm UTC](https://meta.discourse.org/t/undefined-method-sub-when-visiting-admin-upgrade/274682/3 "2023-08-10T15:26:56Z")

</div>

[Standard install](https://meta.discourse.org/t/142537?silent=true), but I admit the site is running since 2018 IIRC, so… but at least it’s docker-based and feels like a standard setup. As I said, so far everything worked as expected.

Plugins:

 ![image](https://global.discourse-cdn.com/meta/original/4X/b/9/2/b9230a2e8130a871181f92ddde81aa25d203aad7.png)

I rebuilt again, fixed the permissions and ran a few `git config --global --add safe.directory …` commands, but the `/upgrade` page is still showing an error and the log says:

```plaintext
NoMethodError (undefined method `sub!' for nil:NilClass)
app/controllers/application_controller.rb:420:in `block in with_resolved_locale'
app/controllers/application_controller.rb:420:in `with_resolved_locale'
lib/middleware/omniauth_bypass_middleware.rb:74:in `call'
lib/content_security_policy/middleware.rb:12:in `call'
lib/middleware/anonymous_cache.rb:389:in `call'
lib/middleware/gtm_script_nonce_injector.rb:10: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/request_tracker.rb:228:in `call'

```

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