Cannot chat
This belongs in the Tech Support forums.
I had this same problem a few weeks ago. Logging out didn’t fix it. You have to close the GW2.exe and reopen it. After I did that, my guild and team chats started working again.
In GW2, Trading Post plays you!
Sorry for wrong category.
I did this also and didn’t fix the issue.
Then I would submit a tech support ticket.
In GW2, Trading Post plays you!