Game crashed trying to log

"Fatal error: D:\\????????????\\steamapps\\common\\Arma 3\\Dll\\x64\\GFSDK_SSAO_D3D11.win64.dll could not be loaded"

Thank you for your report it showed me where the issue is.
We will look into fixing this issue for Arma 2.04 which is still a couple months away.

For now you can move your Arma installation into a folder that has only english letters as name, that will fix it.

I found the cause and fixed it.
It will be included in performance branch maybe next week, and probably with 2.02
https://forums.bohemia.net/forums/topic/160288-arma-3-stable-server-200-performance-binary-feedback/?page=98