Hey Dodg3r!
See if that fix LiamD posted works for you (Thanks Liam!)
If not, we've found this thread that may offers solutions as well: https://www.ctrl.blog/entry/glibc225-unity-black-screen.html
If either of these solutions work for you, let us know!
Otherwise, reach out to us via email here and we'll refund you while we work this issue out.
Best,
Scythe Dev Team