Producer Framework Message

[KTSNEX]

I loaded the Artisan Valley mod and all of the (I think) associated mods. I am not getting and red error messages but I am getting this:

 

[Producer Framework Mod] No Output found for 'Campari', producer 'Still' and input 'Bitter Orange'. This rule will be ignored.

Can someone tell me how to interpret this message and how to correct the issue?