Discourse-subscriptions plugin crashes boot on v2026.3.0

Contribute Bug
1

After upgrading to v2026.3.0 my instance fails to bootstrap with this error:
/var/www/discourse/plugins/discourse-subscriptions/plugin.rb:53:
uninitialized constant Plugin::Instance::USERNAME_ROUTE_FORMAT (NameError)

The USERNAME_ROUTE_FORMAT constant appears to have been removed in this version and discourse-subscriptions still references it at line 53.

Worth noting — the error is misleading. The stack trace implicates whichever plugin calls routes.draw first rather than discourse-subscriptions directly, which makes it easy to spend time debugging the wrong plugin.

2

They are deprecated… but also they are defined in core:

Just confirming are you using our official install?

cc @gerhard / @david

2 Likes
3

I made this PR to remove the deprecation :hugs:

https://github.com/discourse/discourse/pull/38524

3 Likes
4

Yes I’m using the official install via discourse_docker on Ubuntu 24.04.

The error reproduces consistently on v2026.3.0-latest. The constant is not defined at the point discourse-subscriptions loads during route finalization, which suggests a load ordering issue rather than the constant being absent from core entirely.