When we are trying to create new project using template and trying to connect to our on-Premise ECC backend system, we are unable to get services from that destination. The destination is reachable, but it is giving error like - "All catalog service requests failed for system: OData version(s): V2, V4." Please find the attached screenshot related to issue.

We have tried this blog but still the issue still persists.
https://ga.support.sap.com/dtp/viewer/index.html#/tree/3046/actions/45995:48363:53594:48366 https://ga.support.sap.com/dtp/viewer/index.html#/tree/3046/actions/45995:48363:53594:48366:52526
Can anyone help?
Regards,
Ashish