Confirm that the AutoServer port # is consistently defined and configured on both the AE and WCC hosts.
Check $AUTOUSER/config.$AUTOSERV to confirm the port number.
And run the following to display its configuration settings:
$CSAM_SOCKADAPTER/bin/csmconfigedit port=<port> display
To make adjustements:
$CSAM_SOCKADAPTER/bin/csmconfigedit port=<port> enablessl=<value> enablepmux=<value>
Confirm that the hosts can resolve and reach one another using both their short and fully qualified host names.
Check with your network and firewall teams if adjustments such as updating /etc/hosts files or opening ports in the firewall are needed.