The other day I created a multicam sequence of a 3-camera interview and everything worked perfectly. I did a cut, saved the project and shut down the system.
When I opened the project today I can see the background (interview was shot on green), but the video of the participants is not there. As you can see from the attached screenshot, in multicam view the video from all 3 cameras exists. If I play down the timeline, I hear the audio cutting with the background changes. It's exactly as I left it except I can't see the video of the subjects.