Issues with logging into game returned. Experienced the same issues as immediately after maintenance last week. Took me about 20 attempts and about 30 minutes to logon. This was around 20:30 local time. All failed attempts halted at second bar (with village in background) at about mid-way of the bar.
Once in game, everything was normal..... building mines, moving buildings, playing adventures, etc. all went fine.
Strangely though, I logged off and tried to logon again at 22:30 and all went rather quick. Guess it only took about 1 minute and just 1 attempt.
Seems to me issue is related to usage of the server (as 20:30 is at peak hour and at 22:30 many have logged off already).
Note I tried earlier on two PC's, with multiple browsers (chrome and IE), with cable connection and with wifi, clearing cache and DNS, and many more things. Nothing helped.