Mail server stopped working after v2.1.1 upgrade

My mail server suddenly stopped working… can’t login through rainloop, nor can I add it to any mail client, it just outright can’t connect to the mail server. I’ve restarted, made sure the port is open in the firewall, deleted and re-created the emails, re-ran the CyberPanel upgrade script to no avail. It used to work fine and nothing was changed since apart from the upgrade to v2.1.1

There are some issues with the certificates - after the update i get a selft signed certificate for the mail server, and i cannot connect to it anymore. I think this is a wide issue, hope it will be solved

I was able to generate the ssl using this: Bug SSL example.com - Blog Posts - CyberPanel Community