Hi,
I created some emails for some domains and I hadn't sent any emails yet.
When trying to send an email I got a crash in Roundcube and I spent all day trying to fix the problem by changing the Roundcube configuration file, but nothing worked, only the error code changed. So in an attempt to solve the problem (after doing this with Roundcube, several times) I decided to uninstall the Mail Server 4.6 plugin and install it again. Now the problem has gotten worse.
When opening the settings, the error message appears:

This appears to be the same message I saw when I clicked on Refresh domain record a moment earlier
And when I try to add a new domain, it says that it already exists, as shown below

What should I do?