Notice or Fatal  #7

Notice: Undefined variable: dootenv in C:\xampp\htdocs\Rawjobs\rawphp\config\EnvironmentConfig.php on line 13

Fatal error: Uncaught RuntimeException: Unexpected data in output buffer. Maybe you have characters before an opening <?php tag? in C:\xampp\htdocs\Rawjobs\rawphp\vendor\slim\slim\Slim\App.php:621 Stack trace: #0 C:\xampp\htdocs\Rawjobs\rawphp\vendor\slim\slim\Slim\App.php(317): Slim\App->finalize(Object(Slim\Http\Response)) #1 C:\xampp\htdocs\Rawjobs\rawphp\public\index.php(5): Slim\App->run() #2 {main} thrown in C:\xampp\htdocs\Rawjobs\rawphp\vendor\slim\slim\Slim\App.php on line 621