Got the steam group ID from Steam and making a custom game with Steam group and gives an error telling me that I'm not part of that group while I'm actually the administrator.
Steps to Reproduce
Make Steam Group, copy it's ID. Make Custom game, check the Steam group only (or whatever is called) and gives error.
Make Steam Group, copy it's ID. Make Custom game, check the Steam group only (or whatever is called) and gives error.