Hello

Description :

After buying Salt from the Zhou I tried to sell that and my excess pottery to the Hittites. 

Game Completly froze then crashed after selecting the Salt that I wanted to trade.

Steps to Reproduce :

Meet at least 2 other civilizations

Buy Resources from One

Try and Sell it to the other

Reproducibility :

It has only happened once I have not tried reproducing it yet

Expected Behavior :

I expect that I will be able to sale resources to other civilizations who are not hostile to me

Seems you need a Merchant Culture to do that.