Fatal error: Uncaught Error: Interface 'Tribe__REST__Headers__Base_Interface' not found in /home/www/sieml/wp-content/plugins/the-events-calendar/src/Tribe/REST/V1/Headers/Base.php:4 Stack trace: #0 {main} thrown in /home/www/sieml/wp-content/plugins/the-events-calendar/src/Tribe/REST/V1/Headers/Base.php on line 4