I wanted to try the built-in Atlas map.
We are playing with friends on this modpack and I just made a map out of sheets of paper and a compass for the first time. I was thrown out right away, I can't go back in. My brother is offline and we can't restart the server. But it's just weird anyway.
I went the same way on another world with this mod, where we used to play. Everything is fine. The map is created without any problems.