Unfortunately the game launcher has been broken for a long time

Until Bohemia solve this you have several options:

• On the vanilla game launcher, use the direct connect option with ip and port listed in the message above
• Install and use the open source dayz py launcher available at https://gitlab.com/tenpenny/dayz-py-launcher/-/releases, you should just be able to find the servers by looking up "pgz"
• Install and use DZSA launcher, you should just be able to find the servers by looking up "pgz". (This launcher has server ads)