Troubleshoot Woocommerce Square Wordpress Plugin

I use the Woocommerce Square plugin to import products from Square to Woocommerce and sync all of the product data. For some reason, it works on importing most products but there are a few that won't import for some reason. I need someone to troubleshoot it so that all products import correctly.

Plugin: https://wordpress.org/plugins/woocommerce-square/
*Also, the plugin has been modified to add additional features. I can show you the code that was added once we talk.