I was smelt on the Powered Furnace and separate items ,then I placed the right slot,game was crashed,I couldn't join the game once more.
There is VanillaFix in my game,so the screen says"The following mods have been identified as potential causes: Actually Additions, Hammer Core"
Crash report 1st: https://pastebin.com/MPbqc82D
2nd: https://pastebin.com/esNqNtXa
mod list: https://pastebin.com/eYcJJtJv