Apple Mail settings erased after upgrade to Sequoia 15.4.1
3 days ago I upgraded my iMac Mini (purchased ~6 mo ago) to Sequoia 15.4.1. I instantly began having trouble with my emails. I still get all my emails (I think), but the Mail settings have been deleted in the categories of "Rules" and "Signatures". Additionally, the "Junk Mail" behavior setting had been disabled. Finally, the Red Badge on the Mail icon in the dock no longer shows the correct number of unread emails. The Red Badge on my iPhone continues to show the correct number of unread messages, unlike my iMac Mini. I've tried, rebooting, signing out of iCloud and signing back in, without success. What is going on? Is there any hope of recovering my rules and signatures? How can I get the Red Badge to report properly?
Mac mini