Hi
First Save Project As to ensure you can reload your work to the current point.
Do you still have the problem clip on your PC?
What format is it?
Does it play OK in a separate player like VLC?
If this is the case you have the clip at square 1 🙂 i.e. usable.
Open VP and use Options/Disk to empty the cache. You could also check the location of the cache folder (you will find it in Options/Disk). Open the folder and delete all the contents including the sound cache folder.
Now add the clip to VP, either by using Add Files tab or by directly dragging and dropping the clip to the bin area....or even by dragging the clip to the unopened VP shortcut icon.
Once it has been processed play it from the bin in Clip Preview. Does it correctly play in Preview or is there still a bit missing?
If it does play OK drag/drop or place it on the timeline. Wait for the green bar to fully process the clip and check it now plays in Sequence Preview.
If these steps fail, uninstall VP completely from your PC and reinstall from your vpsetup.exe file and try it again.
Nat