We are moving our non-UK European servers to new facilities, bringing better service and reduced slowdown to all players that use them. While this change is ongoing, you may have difficulty accessing worlds located on non-UK European servers, including all German-language worlds.
We apologise for any inconvenience this may cause you. If you cannot access a world because of these changes, please try again later or select one from outside of Europe (or select a world from the United Kingdom).
Apparently, they are moving their servers to other locations. Maybe the cause of the 10 minutes timer I mean moving a whole server o.o...
Another change, every time there is a system update, you won't be able to log on other worlds anymore (even the ones not effected).