I haven't seen -- and I don't think there exists -- a comprehensive listing of failed MAAs, together with the reasons for the failures.
Personally, I can't see a reason for the MAA to fail,* but I also know that I don't have anywhere near enough information to put myself in the shoes of the EMA reviewers. So the only reasonable thing I can do is resort to the published stats on this subject, and they happen to be very favorable.
* Yes, there has been only one trial; it didn't prevent the MAA from being accepted. Yes, the ADL endpoint wasn't met, but the EMA doesn't require you hit all your endpoints if the one(s) you missed are not part of what they need to see to give their approval. And, again, the MAA was accepted notwithstanding this miss.