Mini cart not working

Hello friend i am new in WordPress. i am using abundance theme for a cart website. when i add products in cart its not showing any products when i hover in mini cart button just saying no products in your cart . But if i go to cart page its showing products there. Also if i am logged in, mini cart button is working fine. and if logged out same problem again. link for the website is https://www.horsematsplus.co.uk/
Please help me out in this. i already wasted my two working days in it

And many many thanks in advance…

https://www.ads-software.com/plugins/woocommerce/