Although the Web Agent is initializing and logging, the browser is unable to connect to the IHS web server.
IHS (Apache) was logging two errors to the Event Viewer's Application Log each time the server started. Both errors were the same, stating the sm_module had already been loaded. This caused us to examine the httpd.conf file and we found both the sm_module and SmInitfile were specified three times.
Deleting the two duplicate sm_module and SmInitfile lines and restarting the web server resolved the problem.