so... if you punch play... you get nothing where you should have something?
Is it every audio clip or just certain ones?
Now comes the fun part...... since they are still there in the audio folder, they are recoverable with some effort.
If it's any solace to you, I have done this very thing....deleting a clip or two...well, maybe more then a few, heck, it was a complete vocal track, from a project and then realized after the fact that I really wanted that track with all it's clips back in the project.
Simply go to the audio folder and copy or drag the clips back to the track where they are supposed to be. You will need to line them up again in the proper place....that is the hardest part of restoring them in this manner. But, it is very likely your only option at this point.
I can not remember if I used the drag & drop or import audio to get the clips back...... but I do recall using my audio editor to listen to them to decide what needed to come back to the project before I re-associated them into the project.
Have fun.