Hey, I've been struggling since few days now that almost all my files shows offline - Panel grews out but no question mark icon, which means I didn't lose any files but somhow I "lost" all my editing as in develop Module shows "The file can not be found" and I can't edit them or export them anymore. When I right click on the "missing" file, I could actually track them back to the Finder. All my orginal files are still in the hard drive, I didn't touch them, relocate them or rename them. Somehow, it all went offline as you can see in the photos.
Thanks for reaching out. I'd love to help you figure this out.
Could you please share the specific version of Lightroom Classic from Help > About Lightroom Classic and the specific version of macOS? Has this started to happen recently since an update of the macOS or Lightroom Classic? Does this happen with a specific file format, JPEG or RAW?