Importing meshes with PBR materials not working

It is no longer possible to import objects that were previously exported in Babylon with PBR materials into Sandbox. A month ago, it was working well.
I tested exporting the same mesh twice, one with std materials and the other with pbr materials
This is the link to download the files :
This file has standard materials, so it is possible to load normally

But this file has pbr materials, so a problem occurs when loading into sandbox

Your gltf works for me:

Same for me, not seeing errors with glb

I just found out it there is an incompatibility problem only in chrome browser for ubuntu 20.04,

It is indefinitely loading

It seems like your driver might be crashing there:

You could contact the chromium team as it looks like a bug on their end.