Issue Mailman 2 web interface suddenly gives 500 Internal Server Error, while Mailman still working

[openairhoster2]

Server operating system version

Ubuntu 20.04

Plesk version and microupdate number

Plesk Obsidian 18.0.66 Update 2

Hi,
I suddenly cannot reach the Mailman Web interface anymore. It give m,e an 500 Internal Server Error

/var/log/apache2/suexec.log says:
[2025-01-10 05:03:56]: uid: (10025/stura) gid: (1004/1004) cmd: admin
[2025-01-10 05:03:56]: command admin not in docroot (10025)
or
2025-01-10 02:04:48]: uid: (10025/stura) gid: (1004/1004) cmd: listinfo
[2025-01-10 02:04:48]: command listinfo not in docroot (10025)

or the like
I tried deinstalling and re-installing mailman, to no avail.
Mailman itself is running fine, delivering mails, and its command line also works

Greetings Michael

 

[scsa20]

I don't use this but searching around I did found this: Seems [SOLVED] Mailman - list working, but no cgi-bin/mailman/admin URL

Maybe give the solution a try in post 2?

 

[Sebahat.hadzhi]

Have you installed Mailman through Plesk or manually?

 

[openairhoster2]

I have installed it through Plesk. I even de-installed it (through Plesk) and installed it again (again through Plesk). It didn't help.

 

[Sebahat.hadzhi]

Thank you. Could you please also double-check if there are any additional Apache/NGINX directives defined in Domains > mailmain-associated-domain.com > Hosting & DNS > Apache & Nginx?

 

[openairhoster2]

Actually, there were. server alias lists. But I removed them, and it didn't help. Question: where is the docroot for https://lists.domain.tld set? What should it be? I noticed that in /etc/apache2/plesk.conf.d/server.conf, a few week ago, there was a section for lists.*
But this is missing now. Hower, putting it back in didn't help either. So where are the mailman apache2 settings to be found?