Error in php code

This is no WordPress error (as you can see due to the page being completely loaded, see the WordPress footer, for instance) — it is a user error.

In the add_submenu_page call, you specified the function wptuts_landing_settings_page, while your actual function is called director_settings_page.

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