For which reasons can get_template_part’s $args fail to work? (WP 5.8.1 – PHP 7.4.23)

For which reasons can get_template_part’s $args fail to work? (WP 5.8.1 – PHP 7.4.23)

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