Game doesn't load completely - stuck on "Finalizing... (7/7)" step

I'm in the middle of a casual game that I can't enter because of the following error message:

Error: Uncaught TypeError: Cannot read property 'get_isNeutral' of null, Script: https://atwar-game.com/java/atwar.core.mon_v14.js, Line: 158, Column; 395. StackTrace: TypeError: Cannot read property 'get_isNeutral' of null.

Switching browsers and clearing the cache doesn't help.

Please help me if you can. We have been at the game for about 2 months and were starting to get to the interesting part.

Try and update java etc, and most importantly if you have IDM (Internet download manager) turn that shit off immediately