Plugin not working after latest WooThemes Canvas theme upgrade

Hi Marirs and community,
First of all, thank you for this plugin. It is solving a problem for me and for that I am grateful. With that said, it stopped working for me when I recently upgraded my WooThemes Canvas theme (version 5.6.3). What do you think the issue could be?

Here’s a product on my site: https://www.microbitype.com/microbes-services/escherichia-coli/. I appreciate any help I can get.

Ian

https://www.ads-software.com/plugins/woocommerce-remove-quantity-fields/