Trading post bug, can't buy anything...?
Odd, not sure if this will help, but could you try it and post back to let me know.
1. Open your trading post (leave this open until finished)
2. Open your options panel
3. Change the language to French
4. Wait for the trading post to reload in French
5. Change the language back to English (anglais)
6. Test trading post
(This works for a bunch of other tp bugs, really want to know if it will help here)