LRC issue with trying to access the local sync database

[Barry05]

I switched from MAC to a windows PC a fw days ago. I copied over the Lightroom classic catalog and its associated files. After sorting out differences in drive names all was working well untill today. 

LRC now gets in a loop on startup if I click Restart now.

I do sync to Lightroom but not sure if this is the 'sync' its talking about. I have tried :-

• reinstalling Lightroom Classic
• Running the catalog from two days ago on an external drive.
• Seleting the X icon top right, quit and restart

Restart reopens LRC as I expected but with the same error

Quit, Quits 🙂 but when you restart it still 'loops' to this message.

All software uptodate as its been installed two days ago.

Background info :-

PC is runnning Windows 11;  i9 processor; 64gb ram; various plugins - NIK; DXORaw4; Topaz Photo Ai; qimage

Any Help Appreciated.

Barry

[johnrellis]

Try doing Preferences > Lightroom Sync, hold down Alt / Opt, and then click the Rebuild Sync Data button you're not supposed to see.

[Barry05]

Hi. Thank you for replying. I cannot access preferences , I cannot access anything, as when the message comes up a few seconds after starting LRC I am in a Loop, quit just closes LRC and restart just closes LRC, restarts at the error. 
Barry

[johnrellis]

Try the steps in this help article:

https://helpx.adobe.com/lightroom-classic/kb/local-sync-database.html