Exact same problem here
I've just downloaded the files from the english version of DCS: BS and when trying to activate receive the same error message:
"Activation denied by server. Определенные пользователем параметры некорректны. Проверьте параметры и, если ошибка повторится, обратитесь в службу технической поддержки. (Cannot pass a GCHandle across AppDomains.
Parameter name: handle)"
Tryied disabling firewall and antivirus and didn't work.
My question is: Do I follow the same procedure given to the previous post?
And: Does it waste an activation every time I get this message?
Thanks.