Issue ERROR: Trait "PleskExt\SslIt\PleskXmlRpc\PleskXmlRpc" not found

[burakurer]

After logging into the Plesk panel, it waits on the loading screen for a long time and then gives the error:

ERROR: Trait "PleskExt\SslIt\PleskXmlRpc\PleskXmlRpc" not found (MailService.php:16).



When I use the "plesk repair all -y" command, it gives the following error:

 

[Peter Debik]

At least two different errors are involved here: For one, the mail service seems to having been removed "manually" after Plesk Premium Antivirus was already installed. Second, The SSLIt extension seems to be broken.

An idea to start fixing this could be to remove SSLIt and Premium Antivirus by the command line, then run repair again.
To list all extensions:
# plesk bin extension --list
To disable SSLIt extension:
# plesk bin extension --disable sslit
For other extensions simply use the same scheme. For details, please see extension: Extensions

Fixing the mail issue probably involves repairing the mail server, too.