Fatal error: Uncaught Error: Interface 'TEC\Common\StellarWP\Installer\Contracts\Handler' not found in /home/oldgra5/public_html/wp-content/plugins/the-events-calendar/common/vendor/vendor-prefixed/stellarwp/installer/src/Installer/Handler/Plugin.php:19 Stack trace: #0 {main} thrown in /home/oldgra5/public_html/wp-content/plugins/the-events-calendar/common/vendor/vendor-prefixed/stellarwp/installer/src/Installer/Handler/Plugin.php on line 19