I have resolved my "login timeout" error ! Here is how I have done.
On computer A, no "login timeout" error but always stuck on the loading screen.
On computer B, "login timeout" error after I have been disconnected (specified by an admin). I have tried maybe 5 times and always "login timeout".
On computer A, I have launched DU, login have worked, then the loading screen, too long, then I have closed it.
On computer B, I have relaunched DU to see if that works, and no more "log