Server.php deleted alone in Laravel 5.6

When I stop executing in cmd the php artisan serves it automatically deletes my server.php and I can not create another to put in place, nor create another project with the same name using composer, says that I am not allowed to do this even though logged in with admin.

The error in the browser is this:

  

Warning: Unknown: failed to open stream: No such file or directory in   Unknown on line 0 Fatal error: Unknown: Failed opening required   'C: \ xampp \ htdocs \ projoficina5 \ server.php'   (include_path = 'C: \ xampp \ php \ PEAR') in Unknown on line 0 "

I have already updated the composer and the laravel, nothing works, what can I do about it?