Potions are broken in 2023.4

Potion effects, good or bad, even without any functions to do anything, break the compiler

return Registry.register(BuiltInRegistries.MOB_EFFECT, new ResourceLocation(CreateDPlusMod.MODID, registryName), element);
^
lower bounds: Item,MobEffect,Object,V
lower bounds: MobEffect
where T,V are type-variables:
T extends V declared in method <V,T>register(Registry<V>,ResourceLocation,T)
V extends Object declared in method <V,T>register(Registry<V>,ResourceLocation,T)
2 errors
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':compileJava'.
> Compilation failed; see the compiler error output for details.
* Try:
> Run with --info option to get more log output.
> Run with --scan to get full insights.
BUILD FAILED in 1s
1 actionable task: 1 executed

If someone can also tell me where to find the compiler's error output for more info that'd be great, im struggling on finding how to access it