java.lang.NoClassDefFoundError: net/minecraft/nbt/INBT

[BioMercenaryG]

Trying to figure out the cause of this, unsure what it is i get this error anytime i launch a custom mod pack i created,looked to see if there was invalid depndencies or missing mods, couldnt see anything
https://pastebin.com/2ZxW8SVc

[shutdoor]

Since this seems to be on the 1.12 version of Minecraft, you most likely will not receive any help as this is version isn't supported anymore.