16:47:21.383: [WASAPISource::TryInitialize]:[Kopfhörer (Razer Kraken USB)] Failed to get initialize audio client: 88890008
It looks like it's having issues with your Razer Headset. I would try reinstalling it's drivers to see if that fixes it. Set OBS Studio to 48000hz instead of 44100 and see if that makes a difference as well.