Add to cart & restore cart not working on Safari

Plugin is installed on our website, https://www.currentconnected.com.

Shared a cart, and when the customer clicks either the “restore” or the “add selected items to cart” button, they get a blank page with the test reading “permission check failed”.

Works fine on Chrome/windows, Chrome/Android, Internet/android, AND Chrome/IOS

Does not work on Safari/IOS

What gives?