Fatal error: Uncaught Error: Class "Illuminate\Database\Eloquent\Relations\HasOneOrMany" not found in /usr/www/unityweb/public/hms/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Relations/HasOne.php:20 Stack trace: #0 {main} thrown in /usr/www/unityweb/public/hms/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Relations/HasOne.php on line 20