#phasmophobia bug

so a couple weeks ago my friend and i both got phasmophobia because she finally had gotten a PC laptop like she'd wanted, so we could play games. it was completely fine, working perfectly, until about a week ago/a few days ago. all of a sudden, she can't hear me in game. the game is picking up my audio, my microphone is connected, she just can't hear me. I have tried all fixes i've found online, and nothing has worked. she is sure that it isn't a problem on her side (which i am believing less and less, but if it does end up being on her side it's not her fault if she didn't know)

but anyway. does anyone know how to fix this? it's really frustrating and has caused me a lot of stress, and i want to be able to play the game normally again instead of just facetiming while we play.