Cities disappearing in Casual

Soo I'm playing a casual game, where I enter and get this pretty little ugly error:

Error: TypeError: a is null, Script: http://atwar-game.com/java/mscorlib.min.js, Line: 72, Column: 1, StackTrace: TypeError: a is null

Cute, right?

Nope.

The effect is that all countries either have 0 cities (e.g. all of china) or 1 city (so india has just delhi).

And all the walls disappeared.

Please fix this before the map maker comes out

grr

I had this with Mozilla some days ago, changed to Edge and problem was solved...