Previously I already had a realm for 10 people which expired and I moved to the Realm for 2 people. The problem here is that it won't let me upload my old world from the old (expired) realm to the new realm. It always stays on exporting and when the bar is full the game simply closes unexpectedly. 

I tried several times that it doesn't even let me change worlds anymore, I want to activate the realm celebration map and it doesn't let me, it only lets me manage the first world slot.  I have been with this same error for approximately 3 days, and it happens to me both in the android version and in the Nintendo switch.