Cognizant — Unable to login to 1C portal[protected]

I am unable to login to 1C portal. I am getting an error. This is happening since yesterday. My email is [protected]@gmail.com

Request Id: 15f9546c-47f9-476a-ba8b-752029a23e02
Correlation Id: b5de5cd[protected]df-aa4e-20f26820aff5
Timestamp:[protected]T14:17:13Z
Message: AADSTS90072: User account '[protected]@gmail.com' from identity provider 'live.com' does not exist in tenant 'Cognizant' and cannot access the application 'https://onecognizantexternal.cognizant.com'(ENT_onecognizantexternal_SAML_PROD) in that tenant. The account needs to be added as an external user in the tenant first. Sign out and sign in again with a different Azure Active Directory user account

Your help in this regard is appreciated.