Hello, We have a discourse for the Scala PL for users which was running fine for years : [image] Scala Users a forum for the Scala programming language. beginner questions welcome Last week, I upgraded to the latest version using "./launcher rebuild app ",…

Looking deeper, deleting the _t cookie remove the “error 500”, but the error appears again when logged after maybe around 1h.

v2026.9.0 has not been release yet - are you referring to the development/latest version? [image] Discourse Releases Browse Discourse release history & changelogs.

I’ve not set any specific version, so I guess by default it should be latest (according to "tests-passed" is now "latest" ). In the dashboard, this is the version I get at the bottom.

Error 500 after upgrade to v2026.9.0 / temporary solved by clearing browser data

Support Self-hosting

merefield (Robert) September 3, 2026, 5:18pm 5

In /logs, can you find the 500 error and share the error and its backtrace?

Topic		Replies	Views
Forum doesn't work after latest upgrade Self-hosting	17	519	May 17, 2024
Link to upgrade shows 500 error Bug	6	1074	October 2, 2017
HTTP Error 500 at main forum page after Discourse upgrade Support	4	781	August 25, 2021
:cn: 500 error when upgrading Discourse \| Discourse 升级时候 500 错误 Sysadmins chinese-translation	2	391	May 19, 2024
The discourse stopped working with error 500 Internal Server Error Bug	1	3106	March 7, 2017

Error 500 after upgrade to v2026.9.0 / temporary solved by clearing browser data

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