Have to click ‘add to cart’ button twice before item is added

Hi,

I just purchased and uploaded the plugin on our wordpress site and I have run into a couple of issues.

1) When I click on the ‘Add to cart’ button nothing happens and this javascript error appears in the browser.

“Uncaught TypeError: Cannot use ‘in’ operator to search for ‘length’ in attribute_pa_size=12&quantity=1&add-to-cart=28896&product_id=28896&variation_id=28899”

When the user clicks the ‘add to cart’ button a 2nd time it works fine

2) When I disable the sidebar cart icon and add the class of the ‘Add to Cart’ button in order to open the sidebar cart content it opens but the item I am attempting to add is not being added.

Can you please help with these issues?

Thanks,

Ed