hello, I have the same problem, I can't join any server, even if I host it, It worked a time and not anymore
here is the log, I have made many try, the first was in "Solo"and worked fine.
next I tryied to host a new galaxy and I received this
next again I try to log in my dedicated server
edit: fixed with this http://www.avorion.net/forum/index.php/topic,1650.0.html