can't open any current master catalog or backups

I can't open any of my LRC catalogs.  I get message "AI storage error."  Tried to find the Data storage file.  Supposed to find it in "Help>system info>library.  Window shown after these steps shows no "library."

No problem opening catalogs when I move my master HD to my laptop. Laptop is running LRC 15.4. Mac Mini is running Tahoe 26.3.1

Desktop is running LRC 15.5 release.  Should I re-download software on desktop mini?