[MM3-users] Re: After server upgrade debian 11→12 and reinstalling everything in (venv), I got this error when accessing → mailman3/lists

It's going about the variable $mailinglist_url in footers. Mark exlained, that in mm >= 3.3.10 this placeholder can be used in footers, given, that you have set up $base_url.

This does not work for me. I need to know, WHERE to set $base_url to make $mailinglist_url become working and replaced in footers.