Hello. What do you use to make this ?

Here my solution to this after a lot of research :

Use Recovery Mode:https://cdn.eventideaudio.com/manuals/h90/1.7.1/content/appendix/startup.html#recovery-mode

Make sure you are not using a USB hub.
Make sure there are no other USB or MIDI devices attached to your computer.

Try a different USB cable
Try a different USB port.

try an USB-C to USB-C cable

Make sure no other programs are running.
Make sure antivirus or firewall programs are not interfering with the update.

10. Try a different computer, or device.

For information, I never can do the last update from my MacMini. And it’s simply works at the first try in an old Surface Pro, with an USB-C to USB-C cable 🙂