Photo app - quits with error message, no option to repair librarry
Secondary account on an iMac running High Sierra. As soon as the Photo app is selected, a message pops up to the effect that “An unexpected error had occurred. Quit the app and restart, OK”. Clicking “OK” closes the app but restarting gets exactly the same error message. i have tried to rebuild the library but using Opt+Cmd keys when starting the Photo app simply beings up the page with the same error message. There is no option to rebuild the library. The Photo app works fine on the main account. I very recently had the Mac hard drive replaced as the old one had failed - the techies transferred everything on the old drive to the new and, as far as I have determined, the only app that isn’t working is Photo on the secondary account. Any suggestions as to what to do next?
iMac 21.5", macOS 10.13