Password Protected Page Title

You don’t want to translate the title, so there’s no need to use __() here and you won’t translate ‘%s’, because that’s a placeholder.

add_filter( 'protected_title_format', 'remove_protected_text' );
function remove_protected_text() {
    return '%s';
}

should work.

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