Error Object reference not set to an instance of an object when trying to authenticate using the RSA Authentication Agent 2.0 for AD FS
Originally Published: 2021-05-21
Last Modified: 2022-06-20
Article Number
Applies To
| RSA Product Set: SecurID RSA Product/Service Type: Authentication Agent for AD FS RSA Version/Condition: 2.0.2 |
Issue
| Per relying party MFA is setup and logins work with Firefox and Internet Explorer. Whereas authentications fail when logging in through Chrome and Edge browsers. Following error seen with the RSA Authentication Agent 2.0.2 for AD FS when using the agent for two factor authentication over chrome and Edge browsers.. |
Following error is noticed on the ADFS server.
Event id 364: System.NullReferenceException: Object reference not set to an instance of an object.
The log snipped below is from the rsa_adfs.log, located by default in C:\Program Files\RSA\RSA Authentication Agent\AD FS MFA Adapter\logs
2021-05-05 16:42:41,562 [23] ERROR AuthSessionAdapter - Exception occurred: ActivityId = 200f48ce-626b-4a8c-0500-0080010000bd System.NullReferenceException: Object reference not set to an instance of an object. at RSA.Authentication.FederationServices.AuthSessionAdapter.TryEndAuthentication(IAuthenticationContext context, IProofData data, HttpListenerRequest request, Claim[]& outgoingClaims) 2021-05-05 16:42:41,562 [23] ERROR AuthnAdapter - TryEndAuthentication: Exception occurred: ActivityId = 200f48ce-626b-4a8c-0500-0080010000bd System.NullReferenceException: Object reference not set to an instance of an object.
Resolution
Upgrade the ADFS agent to version 2.0.4
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