HELP! Data source error: [Unable to combine data]

Hello All-Knowing Power BI Folks, 

I'm having an error I can't figure out and could use some help.  I am using service called IPWHOIS.IO to pull demographics data from IP numbers in my customer table.  The service uses a URL and I can add it in without issue and expand the records in Power BI desktop.  I can also publish the report to Power BI service without error (note using relative path).  However when I try to refresh the service I get the error, below.  I have tried a few different ways of adding it but always this same error.  Any idea what is going on?  I really need this data added in my table.  

=Json.Document(Web.Contents("http://ipwhois.pro/",[RelativePath = Text.From([Vimeo_Customer_IP])&"?key=XXXXXXXXXXXX"])))

ERROR: 

Data source error: [Unable to combine data] Section1/Customer_Activity/Added Custom3 references other queries or steps, so it may not directly access a data source. Please rebuild this data combination.. The exception was raised by the IDataReader interface. Please review the error message and provider documentation for further information and corrective action. Table: Customer_Activity.
Cluster URI: WABI-US-NORTH-CENTRAL-B-redirect.analysis.windows.net
Activity ID: f4cbf84e-7ad8-45db-a4e1-c44e547c9e13
Request ID: 74869f38-5d38-ed9c-0ee9-9ee74a7ecebf
Time: 2023-01-14 00:58:20Z