If you are using a firewall on your servers you will need to add a new IP addresses which will now also query your servers.

New IP's:

  • 23.88.35.111
  • 135.181.41.12

You can always find the entire list here: https://www.gs4u.net/en/help/error-when-adding-the-server/general-information-for-all-servers.html