You mispelled it. It is
(x instead of s).
For anyone else reading this is the Apache Tomcat "HTTP Status 500 - No Context configured to process this request" error, not the Apache HTTPD "500 Internal Server Error", unless I am unaware of JBoss/Tomcat using that latter as well.
Please be clear about which 500 error you get if you need help diagnosing problems. The 500 errors from Tomcat and HTTPD are completely different and represent completely different issues.
Thanks you. It was silly of me but made a lot of headway since then.