Hello Ahaus,
On Thursday, October 1st (tomorrow at the time of this post) from 10:00 AM CET to 12:00 AM CET we will be performing maintenance operations that may cause a brief (1-2 minutes) period of unavailability of the game. This will only happen once per game server at most and we don't expect it to last more than a few minutes.
We thank you for your patience while we work to keep everything running smoothly 
Best regards
Your Tentlan Team
