Warning: include(): https:// wrapper is disabled in the server configuration by allow_url_include=0

replace the first line on this

include(get_template_directory() . '/inc/email_templates/quote.php');

when accessing a file, use the absolute path, not the uri

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