>I have a couple inbox messages that are empty, and the user is called "Account Removed." But I can't delete the messages. The title, user, and message date are all empty, so I have no idea what the messages were, except that they were not posted very long ago, maybe a few weeks. Click on Map displays empty screen.
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>I don't really care what they are, but how can I remove them?

You probably have those since a long time. I'll handle them from here.