Fatal error: Uncaught Error: Interface 'Illuminate\Session\ExistenceAwareInterface' not found in /mnt/volume_lon1_01/backend/admin/vendor/laravel/framework/src/Illuminate/Session/DatabaseSessionHandler.php:14 Stack trace: #0 {main} thrown in /mnt/volume_lon1_01/backend/admin/vendor/laravel/framework/src/Illuminate/Session/DatabaseSessionHandler.php on line 14