I think what he is saying is that it won’t take off from the roof because it’s not sitting level, not because it’s damaged. Of course I’m sure he figured something out by now but, I had the same issue when I landed on my roof. Thankfully, I just kept trying and it did eventually take off. It took several try’s. Not sure why it eventually worked, but glad it did.
Is there anyway to override the need for it to be level to take off? It makes sense to not allow that, but from the roof, it’d be nice to have that option. I almost had to get up on my roof. Thankfully it was my roof and not my neighbor‘s.