game crashes when launching with this error coming up
"The game crashed whilst initializing game
Error: java.lang.NoClassDefFoundError: slimeknights/mantle/client/CreativeTab"

Need a full crash report so we know which mod is calling it, most likely it's some mod calling a client side only class in the serverside

crash-2019-03-28_17.48.44-client.txt

ok found the mod that was calling it it was the kyths op moss addon for tinkers so im removing it and closing this issue. sorry for waisting your time.