Hi
when you got error :
add product cart in product detail page then delete or update quanlity
you see number in cart icon is not change
please follow my guide to fix:
open file: /themes/_THEME/modules/ps_shoppingcart/ps_shoppingcart.tpl
find code:
<div class="blockcart cart-preview {if $cart.products_count > 0}active{else}inactive{/if}" data-refresh-url="{$refresh_url}">
replace it to
<div class="blockcart cart-preview leo-blockcart show-leo-loading {if $cart.products_count > 0}active{else}inactive{/if}" data-refresh-url="{$refresh_url}">