Stuck OFBiz Tutorial - A Beginners Development Guide for 16.11

[Shane F. MacIntyre]

I’ve been slowly going through the guide found here:

https://cwiki.apache.org/confluence/display/OFBIZ/OFBiz+Tutorial+-+A+Beginners+Development+Guide+for+16.11

But I have gotten stuck. Somewhere around the “Customizing User Interface”, 
I’ve stumbled, and can’t trace where the problem is.

When I try the demo by adding some data, I receive the following error:

org.apache.ofbiz.webapp.control.RequestHandlerException: Unknown request 
[createOfbizDemoEvent​createOfbizDemo]; this request does not exist or cannot 
be called directly.

Any help would be greatly appreciated,

Shane MacIntyre