Edit: I fixed this by downgrading Galacticraft and More Planets to Build 238. I hope this comes in handy for any future readers!
Here is the new modlist:
VanillaFix-1.0.10-99
SteveKunG's-Lib-1.12.2-1.1.5
AsmodeusCore-1.12.2-0.0.13
MicdoodleCore-1.12.2-4.0.2.238
GalacticraftCore-1.12.2-4.0.2.238...