I have turned on my server, after uploading a map. Once I entered the server, I set out to create missions with the npcs. But when you create one, it is floating as if nothing. I made him hit him but he was still the same. In the end I tried survival, and it turns out that he hit me, but I saw him standing still and flying in the air, someone knows why this is? And you can help me find out, thanks.
Mod version: Custom NPCs 1.12.2 (13may18)
The version can not be, because before yesterday it was good, but even here it is.
here is an image of the problem in the game