Fatal error: Uncaught Error: Interface "Inpsyde\StateMachine\Guard\GuardInterface" not found in /var/www/html1/wp-content/plugins/zettle-pos-integration/modules/inpsyde-state-machine/src/Guard/Guard.php:7 Stack trace: #0 {main} thrown in /var/www/html1/wp-content/plugins/zettle-pos-integration/modules/inpsyde-state-machine/src/Guard/Guard.php on line 7