Seems this mod is using a default Mod Id "examplemod" which is conflicting with another mod (antiqueatlas, going to report this there as well).

Screenshot

Same thing I said in AntiqueAtlasTeam/AntiqueAtlas#184. Somewhere along the line, you copied the example mod out of the Forge MDK and forgot to remove the default classes.

@darkphan This has the same temporary fix as on the other issue as well.

Thank you for bringing this to our attention, and thanks Nut for the support.
This should be fixed in the latest build on CurseForge (2.0.1), the issue was caused by residual information left behind after importing the forge examplemod files. Fixed by running 'gradle clean' before building the jar.