Hi there!
I'm trying to update the firmware of my mixed IAP cluster - to no avail:
At first I tried automatic update (check for new version button) which leads to the message: "image_check_required class not found", so I moved to a manual upgrade, providing URLs:

It appears as if downloading the firmware works. However, the upgrade fails with this in the log:
----------Download log end------------
Download status: Image verify fail
Any ideas?
Thanks!
Tom