trouble accessing most recent Premier Rush project after updating Mac to Tahoe

I just updated my Mac to the latest operating system, and the premier rush project I was working on appears in “projects” as a thumbnail, but nothing happens when I click it.  all other projects open as normal.  I also tried to open it in Premier Pro, but the same thing happens.  others open, but this one does not, although there is a thumbnail.  its a rather long video with a lot of editing hours, would love not to lose it!