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:\AppServ\Apache\2.4.69\htdocs\isha_security\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Relations\BelongsToMany.php on line 763

Fatal error: Uncaught Error: Class "Illuminate\Database\Eloquent\Relations\Relation" not found in C:\AppServ\Apache\2.4.69\htdocs\isha_security\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Relations\BelongsToMany.php:17 Stack trace: #0 {main} thrown in C:\AppServ\Apache\2.4.69\htdocs\isha_security\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Relations\BelongsToMany.php on line 17