Timeline audio has muted

[giuliopirates81]

Hello. I'm dealing with this issue: Premiere Pro timeline went MUTE all the sudden after appearently no operation. I've tried some trick I found in this forum (toggled the solo button, rendered the audio clip..) but nothing worked. I really don't know how to resolve it. Obviously all my previous projects timeline audio works normally. Can someone PLEASE help me???

[Ann Bens]

Make new project and import old one.

See how that goes.