Plesk Ubuntu: 500 Zend_Controller_Exception -Invalid Controller Specified
500 - Zend_Controller_Exception error when accessing Plesk panel. This error is received while accessing the Plesk panel. Running the plesk repair all commands does not detect any problems.

Error
500 - Zend_Controller_Exception
error when accessing Plesk panel.
Description
This error is received while accessing the Plesk panel. Running the plesk repair all
commands does not detect any problems. There may be multiple reasons for this situation to occur. If your automatic updates are turned on, it can usually be caused by problems that occur during the Plesk update. You may need to restart the Plesk update.