[MM3-users] Django: An error occurred while processing your request.

Hi,

I running Debian bookworm and have installed mailman3-full (+ postfix).

I am new to mailman3 (using mailman2 now) and about exploring how to migrate.

I had 3 sites or domains: example.com and two real ones.

When I received emails from postorius, then it came from example.com which is nonsense as I worked with the real lists. So I deleted example.com.

When I call https://.../mailman3/admin or any of the lists, the result is: Server error An error occurred while processing your request.

How can I get out of it? This is only a test environment, so no heart attack.

Thank you for any help. Florian.