I figured out the issue. The plugin breaks down if the category slug includes the word “-and-“. Once I removed “-and-” from the slugs, everything started working again.
Please try selecting “Leads and Collars” or any of its sub-categories. I do have products in these categories (see https://phpbox.net/Products-%E2%80%B9-Bright-Pets-%E2%80%94-WordPress.png)
