Fatal error: Uncaught Error: Class 'PhabricatorMailEngineExtension' not found in /home/cybertoast/sites/phab.cybertoast.com/phabricator/src/applications/spaces/engineextension/PhabricatorSpacesMailEngineExtension.php:3
Stack trace:
#0 {main}
thrown in /home/cybertoast/sites/phab.cybertoast.com/phabricator/src/applications/spaces/engineextension/PhabricatorSpacesMailEngineExtension.php on line 3