Phasmophobia is an online co-op psychological horror Kinectic Games. The title is now available as an Early Access game, so you are bound to run into some technical problems. If you are getting the Phasmophobia Voice Chat not working issue on Steam, here is how you can fix it.
For now, the developers aim to fully launch the game sometime in 2021, however that is subject to change if there are new features added.
Phasmophobia Voice Chat not working
This is a known issue by the developers, and they are actively trying to fix it. However, a few users have tried the following fix, and it has worked out for them.
Open your Steam library, and right-click on Phasmophobia
Select Properties, and then open the LOCAL FILES tab