I have installed A2A client successfully but noticed it doesn't connect to PAM server. There is no firewall between A2A machine and PAM server. I can confirm cspmclientd process is listening on TCP/28888 port on A2A machine and from PAM Client's Credentials > Manage A2A > Clients page I can see the A2A machine is listed but the Version is shown as 0.0.0 and Connection Status icon is orange color.
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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.
A2A client is installed on RHEL 7.x machine
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.