I had the same error, and found the solution here : http://sto-forum.perfectworld.com/showthread.php?t=378891&page=5 which was to download the new launcher from here: http://files.startrekonline.com/launcher/Star%20Trek%20Online.exe Rgds.
Admiral Brandon, your efforts today have saved many lives. Your specially engineered damping field has successfully compensated the sporadic subspace anomaly in question. Special commendations will be sent to Starfleet with cc to section 31. .Tuvok out.