MP, accepting an open game

[Brenmusik]

One of the first games on offer was New Britain. I tried several times to accept, but it continued to show the "envelope".
After playing several turns with other games, I tried again to accept the New Britain that was still on offer.
This time I got this.

NB1.jpg (133.39 KiB) Viewed 493 times

Not what I usually see!
On continuing, I saw this,

NB2.jpg (47.84 KiB) Viewed 493 times

A new one on me, any ideas?
All my other MP games are running ok.