I get this "Unknown Error", too. I got it last year and mailed to the support but never got an answer (or it got lost in spam). It vanished a day or two later.

Thank you. The pictures I posted were from the deployment phase. The center of my army was on the same row as the cavalry on the upper right.

I think if the wagon is two rows behind the last enemy unit it is to far back.

I placed a Standard Wagon and in its description appears "Too Far Back"? What does that mean and what are the effects?

Best regards,

Stefan