Hi John, thank you for this really great guide. I've done all the steps, trying to call an end-point from APEX on my OCI ADB and I get ORA-01031: insufficient privileges. In my case my principal is APEX_240100. The end-pont works fine from the browser or Postman, has no authentication required and it's an HTTPS address.
Any idea that can help me figure it out? Thanks a lot in advance.