[MM3-users] Re: Postorius is not working (throws "Error 500" suddenly after changing POSTORIUS_TEMPLATE_BASE_URL and changing back)

Hmmm, regarding POSTORIUS_TEMPLATE_BASE_URL , just as a remark, 'http://localhost/mailman3/', this was the installed default value.

Regarding the django issue: I do not remember to have triggered an update or so when suddently the error popped up, I did the pip install -U after that.

Do you have a recommendation for me, a hint, how to fix the problem without losing the database and settings of my mailing lists? It is so strange to see the error just right now (while only concentrating on the "template problem"); mailman3 worked for a long time.