can’t access backend while frontend works perfect

/!\ Before change I suggest, please make a full backup (code + database) of your WordPress.

  • Deactivate all plugins.

If it does not help try next

  • Re-upload all files and folders (except the wp-content folder) from a fresh download of WordPress.

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