An update has caused my client’s site to be non-existent after new update of WordPress [closed]

Restore your old WordPress install, then try updating again. Some error might have occurred while upgrading, causing the site/DB to be inaccessible. If the error persist, then you might need to do a manual update of WordPress.

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