Non CSS mime types not allowed

[phen0]

Environment & Version

Environment

• docker compose
• kubernetes
• docker swarm

Version

• Version: 2.0

Description

I'm using a MacBook M1 and in Safari it happens quite often that I get an error opening the Anti-spam menu. The page is displayed but the css is not being processed.

The error message I see in Dev Console is:
non CSS MIME types are not allowed in strict mode

Crawling the internet revealed that this issue occurs also for other projects on GitHub too.

Replication Steps

Login to admin console with Safari. Open Antispam GUI. Open the admin area again. Do this a few times let's say 3-4 times going back and forth and the error will occur.

Observed behaviour

Well a webpage without css looks lousy. And I see the error in dev console:

[Error] Did not parse stylesheet at 'https://post.example.com/admin/antispam/css/prism.css' because non CSS MIME types are not allowed in strict mode.

Expected behaviour

Logs

[nextgens]

I think the new version of rspamd has fixed it in master.

Can you reproduce the problem with https://test.mailu.io/admin/antispam/css/prism.css ? Using credentials from https://mailu.io/master/demo.html#connecting-to-the-server