Dear our friends,
Maybe this issue is occurred by the latest version of virtuemart component.
Please do the following steps:
+ go to "modules\mod_sj_minicart_pro\mod_sj_minicart_pro.php", finding:
$cart->cart_show = '<a class="mc-gotocart" href="' . JRoute::_("index.php?option=com_virtuemart&view=cart" . $taskRoute) . '">' . $linkName . '</a>';
=>
$linkshopingcart = JRoute::_("index.php?option=com_virtuemart&view=cart" . $taskRoute);
$cart->ajaxurl = strtolower(substr($_SERVER["SERVER_PROTOCOL"], 0, 5)) == 'https://' ? 'https://' : 'http://';
$cart->ajaxurl .= $_SERVER['HTTP_HOST'].$linkshopingcart;
$cart->cart_show = '<a class="mc-gotocart" href="' .$linkshopingcart. '">' . $linkName . '</a>';
----------------------------------------------------
+ go to "modules\mod_sj_minicart_pro\tmpl\default_js.php", finding:
var ajax_url = '<?php echo (string)JURI::getInstance(); ?>';
=>
var ajax_url = '<?php echo $cart->ajaxurl; ?>';
Thanks