In order for you to be able to place the products in the PO, it is necessary to assign them to the Vendor.
To do so, simply click on the link below and add the products to the search bar.
https://app.shiphero.com/dashboard/vendors
After this process, it will be possible to add the products in the PO.
Ps: If you don't have a registered Vendor yet, simply create one in Purchase Orders -> Vendors -> Add a Vendor.
If you have any questions, please send a message to support@globalfy.com and our team will be happy to assist you.