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.

I only have that in the logs (production.log), nothing elsewhere: Started GET "/" for 127.0.0.1 at 2026-09-07 08:05:50 +0000 Processing by ListController#latest as HTML Rendered layout layouts/application.html.erb (Duration: 164.0ms | GC: 13.5ms) Completed 500 Internal Server Error in 248ms (V…

It’s on the route /logs unless that is failing too.

Sorry, I was looking at the container logs. Here they are: Message (18 copies reported) PG::InvalidTextRepresentation (ERROR: invalid input syntax for type inet: "unix:" LINE 7: client_ip = 'unix:', ^ ) lib/mini_sql_multisite_connection.rb:109:in 'MiniSqlMultisiteConnection#run' app/models/u…

Are you operating some kind of proxy - can you describe the architecture? Looks like you are trying to pass the string “unix:” to the ip_address field … This could be a misconfiguration upstream of Discourse. There was a similar issue reported, and solved here which related to Caddy: …

Thanks a lot for the help! I have exactly this configuration: [image] Installing Discourse Behind Reverse Proxy using recommended (supported) installation Self-hosting In this post, I will show you exactly how to run discourse behind a nginx reverse proxy. Wh…

Yep. I had the same problem and I just add this new directive proxy_set_header X-Real-IP $remote_addr; in /etc/nginx/sites-enabled/myforum-ssl.com file and that seems to work Thanks @Fabien_1015 @merefield

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

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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
The discourse stopped working with error 500 Internal Server Error Bug	1	3124	March 7, 2017
I'm using a Unix socket between Caddy and Discourse instead of TCP, but from time to time I get a 'unix:' error Support	12	282	August 29, 2026
Forum doesn't work after latest upgrade Self-hosting	17	544	May 17, 2024
Stuck with 500 error after weird bugs and a rebuild Self-hosting	17	2265	January 8, 2024
Link to upgrade shows 500 error Bug	6	1099	October 2, 2017

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

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