SSO /authorize call failing with 400

Hi All,

I am trying to make the auth0 SSO working across different apps.
App1 → localhost:3000 . Redirect uri given to auth0provider is localhost:4200
App2 → localhost:4200

Auth0 login works from localhost:3000 and once login it redirects to localhost:4200 also.
However in App2 wherever we are retrieving token using getAccessTokenSilently. it is not working.
It is calling

which returns 400 error.

Is there anything else to be done to enable SSO across multiple apps?
Please guide