I started having problem with all chat channels being blank upon login and this error appearing:
Could not connect to chat server at tq.chat.eveonline.com:5222. Please ensure that this port isn’t blocked. Retry?
I click retry and all chat channels start working. Then, after some time, the channels reset again with “Attempting to join a channel” message.
Started happening after today’s small patch which downloaded in EVE launcher and updating my Windows 10 to version 1809. Not sure which update caused it, but I updated my OS first, then launched the game and it updated itself too.
My internet is fine with 11ms ping to the nearest test server and 230MB/s DOWN and 24MB/s UP.