shanacc123
/path/to/osTicket/scp/ajax.php should definitely exist. So either permission/ownership issues, file corrupted, or something wacky going on with your setup. Check to make sure the file actually exists, ensure the webserver user (or fpm user) can read and execute it, and look for any related errors in the various logs on the server (general server logs, webserver error logs, PHP error logs, MySQL/MariaDB error logs, etc.).
Cheers.