I’m having issues getting most of my switches to update.
This post in the non-neutral installation thread points to possibly needing the harness to update the bootloaders on older switches to get it to take the update to work, which is rough…
I had issues getting one of my switches to 2.15 (I think) and had to borrow the harness. That one took 3.04 fine. All 5 of my other switches had no issue taking the updates up to 2.18, but are refusing to update to 3.04 now. I still have one in the box from the original release as a backup that I have not tried updating yet.