WooCommerce Boost Sales not working at all

Hello,

I installed and setup the plugin as per instructions in your documents but it didn’t work even website images disappeared and products which should be shown in popup are appearing at the bottom of the website.

I also tried after disabling popup plugin but it didn’t work.
Here is the product where I added upsell products: https://www.saleleads.net/email-list/germany-consumer-email-database/
please also see the attached screenshot and kindly help me fix it asap.

Thank you
Faiz