I am not in V13 but my guess is the new immutable ledger of V13 is the cause. Check for this. Also never upgrade a production server with beta environment.
Thats a leason. Reverted back to version-12 branch. And done backup of some sites, Everything came back as old. But two sites doesn’t have the old backup. All data are okay in those two But desk page not coming.
That might be cause by update of v13 patches in database.