Status 401: "Unauthorized", "message": "Oauth token is not valid"

Dear All,

I am creating a simple single page mobile app built using SAP MDK which creates a PDF document from .docx template using merge API. However, after recieing the bearer token when I make my call to  

https://pdf-services-ue1.adobe.io/assets, I get :

"response": {

                    "status": 401,

                    "statusText": "UNAUTHORIZED",

 

 "text": "{ \"error\": { \"code\": \"Unauthorized\", \"message\": \"Oauth token is not valid\", \"details\": { \"error_code\": \"401013\" } } }\n".

My Code:

 

I have obtained the bearer token following: https://developer.adobe.com/developer-console/docs/guides/authentication/ServerToServerAuthentication/implementation/#generating-access-tokens-programmatically

 

But still I get the unauthorized error. 

Note: The same credentials /token work from Postman and some other Low code no code tools like SAP BUILD Apps. 

 

Best Regards,

Geet