So as the Achaean League, I'm trying to establish a trade route with Crete to trade stone for wood. When I try to, however, the possibility comes up but it says "No route found!." both of the provinces have ports and both have open trade slots. This is happening no matter who I try and trade with, no matter if I have a trade access agreement with them or not. I was wondering if anyone had any ideas why I can't seem to trade with anyone besides myself (not very fruitful).