Do you see this problem marker in JSP Editor or in runtime?
In the JSP Editor. The JSP seems to run OK. The errors I get when I run the site I think are caused by another issue whereby the Tiles Plugin isn't starting up and so the Tiles Controller behind the JSP is not being invoked so a required request attribute is not present.
I have requested help for the Tiles Plugin problem in another discussion.
I'll lodge my details to bugs.eclipse.org.
Sorry about the delay in replying. Problem was solved by re-creating the project from scratch.