[Forbidden 403 when try to add an advertiser]

Hi Ian! Thank you for your answer!

I really don't know, that could be a problem? Could you help me to solve it?

Thanks!

[Forbidden 403 when try to add an advertiser]

I got this error when I try to add my first Advertiser:

 

Forbidden

You don't have permission to access /adserver/www/admin/advertiser-edit.php on this server.

Additionally, a 403 Forbidden error was encountered while trying to use an ErrorDocument to handle the request.

 

My url is: https://www.mydomain.com.ar/adserver/www/admin/advertiser-edit.php

What could be happening?

Thanks in advance!!