I’m going to plus one the issue that Grendert was having. Using version 4.24.3, completely stock. Session creation succeeds, it is set to advertise, I’ve ran through it several times to make sure it’s set up correctly, but outside of testing locally with PIE windows, the session does not get posted to Steam servers.
Steam integration is set up correctly. Trying to test in standalone mode with my remote partner on the project I’m working on, neither of us can see the sessions we create. Same commits of the project and everything. Steam also doesn’t find any local sessions for the games we create (set to use internet, not LAN), but we get valid session IDs. Find servers is also set up fairly simply, following several guides, and I know it works because it works in PIE windows. This issue is a real pain in the neck 