Oh, no. Sorry for this. You seem to have stumbled into a known issue we have on some specific older graphics cards. There’s nothing you can do right now I’m sad to say. But we are working on a solution. Hopefully we will have a real fix with the next alpha release.
If it is an option for you, you could install Animation Paper on another computer to check it out there. Otherwise, patience it the only option. Sorry.
Best,
Niels