This shows the project selected and the browser selected but no images show. So the count of 0 isn't wrong (at least for this screen shot).
I see that the processing wheel is also going, what else was going on at the tine of the screen shot?
If you go to one of the albums in this project and select one of the images and do a show in project ( right click on the selected image, select the command from the contextual menu) what project does it take you to?
Then that's your problem, the images are in that project not in the project you have selected in your screen shot.
How that happened I can't say but if you select the images in the project they are in and drag them to the project you want them in that will solve your problem.
The count of 0 on the project isn't wrong there are no images in that project,