The modid for the 1.12 version of ex nihilo is wrong (creatio now, not adscensio) here:
https://github.com/KnightMiner/TinkersComplement/blob/master/src/main/java/knightminer/tcomplement/TinkersComplement.java#L27

Possibly causes this crash:
BloodyMods/ExNihiloCreatio#62

This is why mod ids should not change... I'll fix it whenever i get another release up.

Thanks ^^
I did change because I am not affiliated with the prior versions, so if insaneau ever decides to update his own version they wouldn't have problems with even using both at the same time.
I'm just saying AppliedLLamajistics and the drama around that.

Fixed in 0.2.3