My viewers cant hear me on stream and neither can I

[Figza]

Hi, When i stream I can't hear anything i say and neither can my viewers, I've watched loads of tutorials and none of them have worked. Please help me and thank you for your time https://obsproject.com/logs/Xm9cyl763tBX9dL2 (i should probably add that everything works fine on my laptop but not on my pc)