BI Publisher to Power BI???

Hi all, I'm trying to 'export' data from Oracle BI Publisher (12.2.1.4.0) (cloud) to Power BI desktop following the guidance in https://www.biconnector.com/blog/oracle-bi-publisher-reports-everything-you-need-to-know/#Connect_Power_BI_directly_to_Oracle_BI_Publisher_data_models

Although my process does not include step 2 as per the instructions in the link and instead goes directly to:

This doesn't seem to be an issue - I input the link to the data model in BI Publisher and select 'OK'.

I'm then asked to enter credentials to access BI Publisher -results in;

I'm at a loss to understand the 'Unable to connect' message. Any indication as to what the issue might be would be appreciated.