Hi @Bhanupriya Verma,

Could you please try clearing your browser cache or using an incognito window? This usually solves the problem.

Let us know if you need further help by commenting on this post or creating a support ticket at:

https://support.commercetools.com/

I tried in incognito window still facing same issue.

Please check this redirected url after running application

https://mc.europe-west1.gcp.commercetools.com/login/authorize?reason=unauthorized&client_id=__local%3Astarter-0aa4b2&response_type=id_token&scope=openid%20project_key%3Acommerce-code%20view%3Aview_products%20manage%3Amanage_products&state=f6e4d809-4d76-493f-bec5-a8daf9471a4c&nonce=f6e4d809-4d76-493f-bec5-a8daf9471a4c 

As a client id I used default one “starter-0aa4b2” ( check in redirected url given ) as suggested while building custom application. Please suggest if anything I am missing while application configuration.

Hi @Bhanupriya Verma , Do you have your commercetools project on GCP-EU region? If not, you may be getting this error as the default starter uses gcp-eu as a cloud provider. If your project is not gcp-eu region, please follow this guidance to update the cloud identifier on the config file. 
If your project is on GCP-EU and you’re still not able to resolve this issue, please open a support ticket via support.commercetools.com