Thank you for your reply. I haven’t updated the firmware. I will give this a try later this evening. Before I do so: Is it save to only update the WiFi shield firmware?
I don’t want to run into any firmware mismatches between the H7 board and the WiFi shield, as the linked github repository stated to use a specific firmware. I have flashed the referenced one via the IDE and don’t see a OSError, as mentioned in this thread.