Need Help with Voip

Whenever I push my push to talk button I do not see the indicator above the hotbar that my mic is working, I also cannot hear other people trying to talk. I have searched online for a while but I cannot find a solution. It seems like a lot of people are struggling with this same issue and no one knows how to fix it. My mic used to work just fine in the past, but all of a sudden it has stopped working. Does anyone have any suggestions?

Things I have tried:
verifying game cache
re installing
Setting steam Microphone settings to default communication
Changing push to talk button

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