Great mod here The_M! 
BTW I have encountered what @Cirdain reported. In my case the “bug” was triggered when generating a new world and I had both the latest Settlement Decor mod and the Stonehearth Cafe 1.4 mod. Either mods would be fine but would definitely cause the issue when used in conjunction. In fact a another error would occur and report the ff:
co-routine failed: std::exception: ‘‘stonehearth’ has no alias named ‘plants:foxfire’ in the manifest.’
Hope my report helps.