Hello,
new Launcher is using a system component that is either missing or misconfigured and the .NET Framework that we use isn't handling this correctly. Apparently Microsoft has already fixed the issue, although I don't know whether the fix is available at the moment (https://twitter.com/rrelyea/status/667888929530474497).

We're investigating our options how to workaround this issue, but at this moment I'd recommend you to run the System File Checker tool to check if all system files are in place and correct: https://support.microsoft.com/en-us/kb/929833

But what can i do in this time i mean i payed 50€ for this game and cant play it.

I'd recommend you to run the System File Checker tool to check if all system files are in place and correct: https://support.microsoft.com/en-us/kb/929833