Hi again, it seems like this is the same bug that has persisted when playing on your Windows 7 computer. I'm not entirely sure what's happening since I made a fix for this a while ago. There's very little to no information regarding this bug and why it appears and only some have speculated that it's to do with something relating to the Windows WebGL. Whether your computer supports WebGL is something I wouldn't know. If you want to look into this further you can use this link: https://superuser.com/questions/1330055/my-computer-windows-7-does-not-support-w...
There's no guarantee this will fix the game error but it's the only thing I can find.