Deprecated: Illuminate\Database\Eloquent\Relations\BelongsToMany::findOr(): Implicitly marking parameter $callback as nullable is deprecated, the explicit nullable type must be used instead in C:\Apache24\htdocs\invitation-app\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Relations\BelongsToMany.php on line 731

Deprecated: Illuminate\Database\Eloquent\Relations\BelongsToMany::firstOr(): Implicitly marking parameter $callback as nullable is deprecated, the explicit nullable type must be used instead in C:\Apache24\htdocs\invitation-app\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Relations\BelongsToMany.php on line 805

Fatal error: Uncaught Error: Class "Illuminate\Database\Eloquent\Relations\Relation" not found in C:\Apache24\htdocs\invitation-app\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Relations\BelongsToMany.php:17 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\invitation-app\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Relations\BelongsToMany.php on line 17