Yes my mod root folder is “RefugeeTown”. The one in the launcher is “refugee-town”. I fear that working with the same name syntax can causes my working folder to be erased if I download the launcher one by mistake.
I wrote back [mainMod]:creatureID according to your advice and checked everything. I realized I had made a mistake in my submod mod.JSON so it was reading the whole file… as an hero class… 
It seems to be working right now, thank you.
