i got all the mods from curseforge but it had the same core mod problem like the op
AdvancedRocketryPlugin (AdvancedRocketry-1.12.2-1.7.0-232-universal.jar)
MixinBooter (!mixinbooter-4.2.jar)
llibrary (llibrary-core-1.0.11-1.12.2.jar)
MicdoodlePlugin (Galacticraft-1.12.2-4.0.2.284.jar)
AssetPlugin (StarMaker-1.12.2-0.0.5.jar)
JustEnoughIDs Extension Plugin (JustEnoughIDs-1.0.4-SNAPSHOT-thin.jar)
GSHooksLoader (GalaxySpace-1.12.2-2.0.18.jar)
SteveKunGLibPlugin (SteveKunG's-Lib-1.12.2-1.2.0.jar)
iceandfire (iceandfire-1.9.1-1.12.2.jar)
CTMCorePlugin (CTM-MC1.12.2-1.0.2.31.jar)
is this a 1.12 problem?