Thanks a lot for the feed back and offering to test! I might have found the issue: the game runs in a local client/server configuration that utilizes a specific port number. If your system has that port number reserved in some range, the game would die silently
Here is a test build with the fix implemented:
https://psyclimb.itch.io/boneglaive-test-build/download/xvZn8EqDpKf3d2xFUWezf_vq...
Can you extract that zip file fresh and test a game VS AI once? If it works, great! If it doesn't, can you send me any resulting error output: from the main menu or otherwise?