FlashEx [error]

So, there is a game named 'Tanki Online' and I was fine using it, but when I installed windows 10 some type of error comes. I can't install Windows 7 again so any suggestions?

TypeError: Error #1010: A term is undefined and has no properties.

  at platform.client.fp10.core.service.clientparam::ClientParamUtil$/collectClientParams()

  at platform.client.fp10.core.network.handler::ControlCommandHandler/sendConnectionResponse()

  at platform.client.fp10.core.network.handler::ControlCommandHandler/onConnectionOpen()

  at platform.client.fp10.core.network.connection::AbstractConnection/onConnect()

  at platform.client.fp10.core.network.connection::SocketConnection/onConnect()

Help me please!

Thanks...