When you get the exception page does it say something like:
Exception: Not saved - no valid save locations.
*Update*: I think I may have solved the issue. Are you willing to test it out? It'll require downloading a new test build.
Hi!! sorry for the late reply! I think it's okay now?? i tried uninstall and reinstall the game entirely and now it saves just fine. I think it was probably my pc's fault?? it's quite old. Sorry for the trouble !