Issue I cant manage emails in the Mailman Held Messages queue, and cant reset Mailman

[Frostbolt]

I'm trying to manage emails in the Mailman Held Messages queue. I try to allow or ignore a message, but nothing happens. (no error, the page refreshes but the email is still there)

I suspect the error is originating from changing domains in Plesk.

I tried reinstalling mailman, but the old configuration is still there. Is there a way to reinstall mailman and somehow reset all configuration so it's all fresh?

 

[Frostbolt]

I've also tried asking people from mailman but the support page there says if you use plesk you should ask Plesk.