A2A client is installed on RHEL 7.x machine
A2A client of PAM 3.2 version, i.e. version 4.15.0, is installed and it doesn't communicate well to PAM 3.0.3 due to incompatibility.
From CA Support Online Download Center download A2A client of PAM 3.0.1 version, i.e. version 4.13.1. Uninstall A2A client version 4.15.0 and install 4.13.1 instead.