I guess we’ll have to wait and see. My understanding is that per 5e a paladins needs to be level 3 before they even take an oath, so it’s not clear how they could break it before then. But of course our EA paladins started off level 1 with an oath so we’re looking at some Larian homebrew here. I don’t see why, if we have an oath at level 1 or 2 we shouldn’t be able to break it, though.

"You may call it 'nonsense' if you like, but I've heard nonsense, compared with which that would be as sensible as a dictionary!"