Error - Failed to add 'SAP-Connectivity-Authentication' header for on-premise connectivity - sap-cloud-platform

Question

I am connecting an On-premise S/4 HANA with SAP Cloud Platform trial account. I am using SAP Cloud SDK to fetch all Business Partners from S/4 HANA.
My Cloud Connector is set
My Destination at Sub-Account level is set and can ping to my on-premise system
My Service instances - XSUAA/Destination/Connectivity is set with the application
But I have the following error
Failed to add 'SAP-Connectivity-Authentication' header for on-premise connectivity: no JWT bearer found in the 'Authorization' header of the request. Continuing without a header. Connecting to on-premise systems may not be possible
The code which I am using is -
final List<BusinessPartner> businessPartners =
new DefaultBusinessPartnerService()
.getAllBusinessPartner()
.select(BusinessPartner.BUSINESS_PARTNER)
.execute(destination);
It seems AppRouter is the recommended for Authorization and Access and hence I tried implementing one- but my approuter shows - Not Found
Approuter App -Name - approuter-demo
Below is the xs-app.json
{
"routes": [
{
"source": "^/s4ext/(.*)",
"target": "/s4ext/$1",
"destination": "******"
}
]
}
The Manifest file is as below:
---
applications:
- name: approuter-demo
routes:
- route: approuter-demo-*****trial.cfapps.eu10.hana.ondemand.com
path: approuter
memory: 128M
env:
TENANT_HOST_PATTERN: 'approuter-demo-(.*).cfapps.eu10.hana.ondemand.com'
destinations: '[{"name":"******", "url" :"https://s4ext-***.cfapps.eu10.hana.ondemand.com", "forwardAuthToken": true }]'
services:
- xsuaa-demo
- connectivity-demo
- destination-demo
Kindly guide me. Thanks.

Answer 1

Your destination type might be wrong. The authorization header is set via the destination.
Try other types in sap cp -> connectivity.

Answer 2

Reading your question again I can identify two issues:
This error message in your log:
Failed to add 'SAP-Connectivity-Authentication' header for on-premise connectivity: no JWT bearer found in the 'Authorization' header of the request. Continuing without a header. Connecting to on-premise systems may not be possible
It may be that this error message is actually superfluous and hence indicating a problem which is actually none. In your case this header is possibly not necessary and the SAP Cloud SDK should not try to add it. But in any case, this will not influence the actual connection, so this error message is at most confusing, but not harmful in the sense of altering functionality.
Still, I am asking you to add the stack trace of this exception to your question to be very sure here.
Your app router shows "Not Found":
Here I am missing more information. When does what exactly show "Not Found"? Is it that your browser cannot find your app router, or can your app router not find the target URL of the application?