Hi @Mcree! The ability to print shipping labels is a part of the paid tier for Weebly. Are you being asked to upgrade when you attempt to print the labels with us? If so, you will need to pay for that feature. 

As a workaround, you can also create your own Shippo account outside of Square and purchase your single label separately, but if you plan to send multiple shipments then it may be worth upgrading with Square.