Getting an odd java.lang.NoClassDefFoundError exception-Collection of common programming errors

I’m getting an odd exception when running my java web project. It seems like this ‘randomly’ happened after I saved some changes to one of my JSPs. I don’t ever remember changing around any settings. I’ve never run into any errors like this before from this project, it’s had no problem finding the HubPortal class before.

Here’s the full stack trace:

org.apache.jasper.JasperException: An exception occurred processing JSP page /hubmainpage.jsp at line 7

4: %>
5: