Fatal error: Uncaught Error: Class 'Illuminate\Database\Eloquent\Relations\BelongsTo' not found in /home/app/htdocs/ninja/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Relations/MorphTo.php:13 Stack trace: #0 {main} thrown in /home/app/htdocs/ninja/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Relations/MorphTo.php on line 13