Previews gone, classification gone after reinstall?

[Macbook_Rijk]

i reinstalled lightroom 9.2 after a clean install of my Mac. Loaded the correct catalog in lightroom and now all previews and classifications are gone? Please support.

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[Rob_Cullen]

a clean install of my Mac. OK

reinstalled lightroom 9.2  OK

Loaded the correct catalog in lightroom OK

and now all previews and classifications are gone?

And where are your photo files stored?

Are the Previews totally not visible, or just greyed out?

Where are your backups of all photo files?