Upstudio wont load stl

Hi is there any known bugs where stl will not load in upstudio?
its very strange especially as its a super simple part…
i created it in onshape, i can view it in apps like paint 3D, however when i load it in upstudio, nothing. older saved stl’s will load with no problems.
my upstudio version is 2.6.75.627

I have the same issue. Hope you figure it out.