ERROR: Cookies are blocked or not supported by your browser. You must enable cookies to use WordPress

In my case it was a plugin which I installed yesterday night.
In the next day I got this error.
SOLUTION : Deleted the plugin from wp-content/plugins and every thing was OK after that.

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Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)