Hi, I was able to test last night. Unfortunately, the problem seems to persist. My friend and I are still unable to play a mission together at all. We tried different characters at different points of the main quest (Martyr), different levels, with or without seasonal character, but nothing seems to work.

The problem is the same as initially mentioned, we can join each other on the bridge and see each other. When the hosts select a mission and we both accept, the host sees the loading screen and proceeds as normal. The extra player sees a window connecting to the server, and after a few seconds (5 to 10 seconds?), the error appears as before "You have been disconnected from the server. In-game progression has been lost and you will be returned to the Command Bridge.". We tried pressing the reconnect button many times but the result is always the same error.

Do you need more information from us in order to determine the error?