Does anyone know how I could solve this error with sketchfab?

Hi ,

Usually, this error occurs when Twinmotion is prevented from accessing certain folders on your computer. The fix for this error is to open the Controlled Folder Access setting in Windows Settings and add Twinmotion to the list of exclusions.

This discussion post goes into more detail from users who previously experienced this issue.

Best,

Raghib

Thanks Raghib!