If you are running into issues when trying to purchase items on Steam you may need to enable the Steam overlay.
- Open your Steam client and navigate to the Steam > Settings > In-game tab. Toggle on Enable the Steam Overlay while in-game.
- Afterwards you also may need to restart your game.
You can also turn on/off the Steam Overlay per game so check to make sure you have it enabled in your Steam game library as well if you still run into any issues.
- Find Splitgate in your Steam Library
- Right click on the game and go to Properties...
- Under the General tab, you'll find a checkbox for Enable the Steam Overlay while in-game, make sure that is enabled