Fatal error: Uncaught Error: Interface "Illuminate\Contracts\Concurrency\Driver" not found in /home/justin/projects/calsyncv2/calsync/vendor/laravel/framework/src/Illuminate/Concurrency/SyncDriver.php:12 Stack trace: #0 {main} thrown in /home/justin/projects/calsyncv2/calsync/vendor/laravel/framework/src/Illuminate/Concurrency/SyncDriver.php on line 12