VisualAnnotate Error

System

Any idea what causes this one when using the VisualAnnotate CCI link from email?

Error: 500
Location: /iw/webdesk/review
Internal Servlet Error:

java.lang.ClassCastException
at com.interwoven.teamsite.blobulator.BlobCommandServlet.getBlobContext(BlobCommandServlet.java:38)
at com.interwoven.teamsite.blobulator.AbstractBlobServlet.doGet(AbstractBlobServlet.java:154)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at com.interwoven.framework.base.FrameworkServlet.service(FrameworkServlet.java:66)
at com.interwoven.framework.auth.AuthServlet.service(AuthServlet.java:96)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:405)
at org.apache.tomcat.core.Handler.service(Handler.java:287)
at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:797)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:743)
at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:213)
at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:423)
at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:501)
at java.lang.Thread.run(Thread.java:536)