RoundCube (Internal Server Error) - Fix mailbox

If you're getting Server error (Internal Server Error) in Roundcube that is because you've some incompatible version of the Roundcube mail client is installed on your server which we didn't currently support. To fix the issue you need to run these commands one by one :First run the CWP Update script that will ensure you've latest version of CWP :

 Second run the CWP roundcube update script :
This will install supported version of Roundcube and error will be fixed, if you're still getting internal error then you need run this script to fix the mail permissions :Make sure you also check the logs
/usr/local/cwpsrv/var/services/roundcube/logs/errors.log
/var/log/dovecot.logPermissions for /var/vmail