Fatal error: Uncaught Error: Interface "Inpsyde\StateMachine\Event\Transitioning" not found in /var/www/html1/wp-content/plugins/zettle-pos-integration/modules/inpsyde-state-machine/src/Event/PreTransition.php:5 Stack trace: #0 {main} thrown in /var/www/html1/wp-content/plugins/zettle-pos-integration/modules/inpsyde-state-machine/src/Event/PreTransition.php on line 5