If you're not able to bake Preview images of the FAB Assets with the Asset USD Builder 1.0. This video will show you how to fix this issue so you don't need to wait for the revision. This will be fixed in the Asset USD Builder 1.1

Here you can download the Python script I mentioned in the video:
https://we.tl/t-bm9ToGYFx6 [we.tl]

And here you can download the Load Script Solaris HDA I mentioned in the video:
https://www.orbolt.com/asset/Carlo_Jongen::load_script_solaris::1.0