Problem migrating Scalar book from one Reclaim site to another

I am trying to migrate this Scalar book on another Reclaim site:

To my Scalar installation on my Reclaim site:

When I try to do it through the Import URL, I get this error:

There was an error resolving the Save API URL

I have also tried downloading the RDF-JSON file from the original site and uploading it but am getting the same error message.

Can anyone assist me with this?

Thank you!!

Hi there! Apologies for the late response here! Were you able to migrate the book over to Let me know if you need any additional assistance here.