Sidebar doesn't appear on product page

Hi,

I’m setting up an online bookstore and using the Weaver II theme, which works very well with WooCommerce, except for one problem — the sidebar doesn’t appear on the product page, and the placement of everything is seriously misaligned. The product image appears way to the left, the text of the description at the far right, and a lot of space in between. All the other pages are fine. I don’t know where to begin to solve this, and am new at coding. I realize that all themes, are different, so I hope a user of Weaver II can give me some help. Thanks

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