Divi theme update with WPMU Hub problem

Hello,
WPMU Hub can update most of my themes and plugins, except for Divi
I made a (unlisted temporary) video to show what's the problem :
https://www.youtube.com/watch?v=YZZOqh3OLbU

Of course I got API credentials of the theme that I bought.
This happens for ~30 different websites using Divi and WPMU Hub, and this problem lasts for 1 year.

Any idea what could be the origin of the problem ?
Many thanks