@desertoth The mod creators have left, so there's nobody to provide good answers.
However, the mod is highly sensitive to clashes with other things, so there's a significant risk things won't work properly. You'll experiment at your own risk.
@Indigoo777 It sounds like you haven't actually researched or produced human weapons, but rather just disassembled alien weapons to provide "cores" that can later be used as parts when producing human weapons. Read the Xenopedia entries for the research you have performed (or check the workshop descriptions for the entries you thought produced weapons) to see if you're actually able to produce weapons. My guess is that you've gained some understanding in alien weapons, but need to research how to actually apply lessons learned. That typically requires interrogation of aliens, but I'm not sure if the first set of energy and ballistic weapons require that step, as you get those fairly early.