Side by Side extension APPlication

[sandy316]

Hello Experts,

We are facing a peculiar issue for our custom side by side application which we have created BTP with S4HANA public cloud. 

Our architecture includes "S4HANA extensibility service" for creating communication arrangements on the Public cloud side along with the development of custom app using NODE.js within CF framework. 

Our destination service connectivity is all intact and we have been able to pull the metadata of the service using the user id and password we provided in the json file we used for the "S4HANA extensibility service"

We have one subaccount and have tied it up with the IAS/IPS server of the S4HANA public cloud. Our global account is still tied up with the standard (default) SAP ID.

When we try to get to our portal/workzone subscription site, we get authenticated via IAS server of public cloud which is correct. However, when the site tries to open, we get the below error 

Appreciate your help.

[junwu]

????where is the error?