It sounds like the issue has gotten worse over time. Initially, the game would crash a few minutes after starting multiplayer when others joined, but now it won’t even let you start or enter a lobby. This could be due to corrupted game files, a recent update, or server issues. A few things to try: verify the game files, reinstall the game, check for updates or server status, and make sure your firewall or antivirus isn’t blocking it. If none of that works, contacting support may be necessary.