On the german boards they discovered a working work around for the registration problems. It may sound rather awkward, but I followed the instructions and I can say: yes it works. I am patching at this moment. This work around is only for entering your OB-Code. You have to have an account already.

Not sure whom to give credit as there are numorous threads about it, i am linking one with screenshots: http://forum1.onlinewelten.com/showthread.php?t=278458.

Instruction:

Go to the registration-site http://www.war-europe.com/#/myproductkey/
Do not enter anything. Instead refresh the site until the login-box is in the center of the screen. Then enter your password and confirm. This will allow you to enter your code. Now if you click on confirm/validate yu will get the famous error. Don NOT click on OK, instead click on validate until it works.

Have fun and enjoy

Hab jetzt auch noch paar mal den Code eingegeben und verschickt. Hoffe das wird jetzt mal was. Das is bisher die ärmste Open Beta an der ich teilgenommen habe