This error occurs when trying to run a custom BIRT Report and is most likely caused by a lack of memory.  Logging completely out of your BizApp session and log back in again may help.

Error Details:
Error 500 Unable to load class for JSP
HTTP ERROR 500
Problem accessing/viewer/frameset.  Reason:
Unable to load class for JSP
Caused by:

org.apache.jasper.JasperException: Unable to load class for JSP