It says: "I have 1 new message,' yet I have no new messages?

the browser tab has the red dot on it and when i switch to it the tab says 1 new message doesnt matter the browser i try'd opera and firefox i deleted cookies and disable extensions nothing works it still shows "1 new message" yet i have checked all folders spam etc and there is no new message there... show more the browser tab has the red dot on it and when i switch to it the tab says 1 new message
doesnt matter the browser i try'd opera and firefox i deleted cookies and disable extensions nothing works it still shows "1 new message" yet i have checked all folders spam etc and there is no new message there are allot of unread messages but that's not the point they are not new how to get it working again?
Update: i deleted all spam and it went away for now
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