Add to Cart button on Sidebar Cart

Hi Guys,

Please see attached screenshot.
I have variation options for all of my products.

In the Sidebar Cart there is a ‘+’ add to cart button in the ‘best selling products’ area. This button doesn’t work for my products because they are all variation items. The website simply reloads the page when clicked.

Is there any way to change this button so that it simply links to the relevant product?

Thanks