I don't know if this issue has already been solved or what but I couldn't find anything about it. Whenever I try to load in minecraft it crashes a says java.lang.NoClassDefFoundError: slimeknights/tconstruct/library/client/MaterialRenderInfo

pastebin https://pastebin.com/57yTK1dw hopefully it works now I set expiration date to 1 year

I have
Minecraft: 1.12.2
Forge: 1.12.2-forge-14.23.5.2854
Mantle: 1.12-1.3.3.55
Tinkers Construct: 1.12.2-2.13.0.183

and its only with tinkers construct no other mod causes this problem

Looks like a duplicate of #4441. Fix it by removing LuCraft or yelling at them to fix their broken mod, I am pretty tired of dealing with their bug.

how did you fix it, i have the same problem

Your pastebin link is dead. Nothing we can do without more information.

I figured out what was wrong and fixed it