Semi-solution here: I have two mail accounts, an iCloud and an Office365. On a whim, I deleted Contact from the O365 account in Internet Accounts, and Contacts now works fine. OK for me, since I keep all my contacts on iCloud.YES!!!! I am getting the exact same thing. I actually came here to ask this question. I've tried deleting the .plist files and that did nothing. I rarely use Contacts since I use Outlook. But it bothers me that something isn't working. Maybe it will be fixed in the next update?
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