Fatal error: Class 'Illuminate\Database\Eloquent\Model' not found in /var/www/html/dev/spa/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Relations/Pivot.php on line 6

Call Stack:
    0.0006     253208   1. {main}() /var/www/html/dev/spa/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Relations/Pivot.php:0