Bejelölt bejegyzések '99 warden'

 How can I fix the error: doveconf: Fatal: Error in configuration file /etc/dovecot/conf.d/99-warden.conf line 9: Unknown section name: plugin after upgrading to Plesk 18.0.73?

After upgrading to Plesk 18.0.73 dovecot refuses to start. This is because Plesk upgraded dovecot...