Upgraded catalogue can't access External HD and images
But other upgraded catalogues can. Plus I can create a new catalogue and access the images perfectly happily. All the files are on the same hard drive in the same location they have been forever.
If I try and see the original file I get this:

Then when I try to loacate the files I get this.
This is my main catalogue with 71,000 images in - It was working fine with previous versions of Lightroom Classic until I updated the app.
Anybody have any suggestions?
Thanks
