I don't exactly know what's going on. But I'm playing with my girl on a private server 1.12.2 with mods that has astral sorcery and it crashes all the time, its says it's because some shooting star thing and also I belive it's because I'm playing multiplayer.
Also, when I join to the server it says:

Anyone can help me?

I found the problem. It was the forge mod version lol