WooCommerce Free Shipping Bar conflicts with SG Optimizer

Hi there,

My WooCommerce is currently using the free version of Free Shipping Bar plugin and it has conflict with my SG Optimizer (a cache plugin by Siteground). I am getting the attached error message whenever I try to enable Dynamic Caching and Memcached in SG Optimizer and it will only work if Free Shipping Bar plugin is deactivated

I’ve read the forum (https://wordpress.org/support/topic/conflict-with-sg-optimiser-2/) with similar issue but cannot resolve the conflict between two plugins. Therefore, I would like to know if using the premium version of Free Shipping Bar (https://codecanyon.net/item/woocommerce-free-shipping-bar/19536343) will be able to resolve the issue right away? Thank you

Regards,
MZ