You have to be on a file that has beaten moms heart 5 times. It's a glitch that has not been fixed to my knowlege. once your on "it lives" then you can continue.

Had to uninstall and re-install the game to get it to work.

I haven't been able to get godmode to work at all on windows 10. has anyone else had the issue? i will work on trying other mods and trying god mode again.