An unexpected error occurred while updating files
You may increase this timeout value with any amount as per your choice.
It may happen for 2 -3 minutes and then after that the panel starts behaving in a normal way.
I was working on Fuse 1.3 and its never had problems uploading until now.
I hit the "Animate" Yellow Button to go right Mixamo's Auto Rigger and I encountered a whole bunch of problems.
A research revealed that any type of Windows 10-1607 (virtual machine or physical, with different motherboard/NIC manufacturers) running in a virtualized environment can, and usually does, encounter this error when trying to create or rename a folder.
The process of such task is extended obviously from the first click and eventually freezes handing File Explorer and ending up with an error message “Error 0x8007003B: An unexpected network error occurred.” Several people pointed out that the error causes Outlook to stop working either.