Hello PEARLE! Is this question still relevant? If so, please let us know and provide more information in private message, so we could investigate. Also, describe your actions in the game before the error message appeared. Thank you in advance. We're waiting for your reply. 

Hello PEARLE!

please follow the link below to find the instruction with possible steps to solve this issue:

https://plarium.com/forum/en/vikings-war-of-clans/technical-questions/106959_what-does-the-game-need-to-work-correctly-/.

If the situation doesn't change after performing the specified steps, please send us the information of all browsers you use to play the game, PC's configuration and the screenshot of the error message. Also, describe your actions in the game before the error message appeared. Please provide us with this information in private message. Hope for your understanding. Thank you in advance.

Actually.... I believe this is caused by login server overload. It only seems to occur at peak times, it is not related to ANY static factor (same PC with same configuration and same account can connect at a time and not at another time). This excludes it being related to PC configuration, browser, or Java. Internet connection quality is the only factor left. So, if you know your connection is good atm and you still cannot connect, then it is pretty much a server overload, and Plarium need to add more login servers or manage server load balancing better.

It could also be a WiFi problem during peak hours in your locality. I recently changed providers and it drastically cut down my lag/disconnections during primetime.