When attempting to login to WCC through an AWS load balancer URL, the login fails with the following error...
E150004: An error occurred during authentication. Authentication between CA WCC and EEM failed
The error only occurs when accessing WCC through the load balancer URL. If accessing each WCC server URL directly, the login with the same credential is successful.
Release : 12.0
Component : CA Workload Control Center
Ensure the AWS load balancer is configured with sticky sessions. Details about this configuration can be found here...
https://docs.aws.amazon.com/elasticloadbalancing/latest/application/sticky-sessions.html