Hi guys! I finally found what the problem was with my error in bandicam.
I made a 4 minute video of how i fixed it since it's easier to explain in a video.

https://www.youtube.com/watch?v=FsNDcZgemCw

In short, something is using your microphone in the background. For me it was my onboard audio card for some weird reason since i have a USB microphone. I show how to find what program is using it and how to fix it.