Cognizant Technology Solutions — Cognizant: I'm unable to login in one cognizant portal

My Cognizant Onboarding Portal is giving issue when I'm trying to Login, can you please help me in fixing the issue, I have followed the steps given in the document but the home page is not showing up any Icon, for the reference I have attached the Image below in this mail and I have tried to login from One Cognizant Onboarding Portal But the following issue I'm getting.
Sorry, but we’re having trouble with signing you in.
Request Id: 6b8518f7-7e7e-4961-8bd3-f91df4388800
Correlation Id: c449c[protected]bac-b447-03d3edd1a8ca
Timestamp:[protected]T08:02:21Z
Message: AADSTS50105: The signed in user 'sulochanakaruturi10_gmail.com#EXT#@CognizantOnline.onmicrosoft.com' is not assigned to a role for the application 'bfa29fe0-bf2d-48ce-96e0-2a3cd378de1a'(ENT_onecognizantbcazrapps_SAML_PROD).