Workflow action "Update all content" on node hippogallery fails with a NPE

This is the stacktrace.

javax.jcr.ItemNotFoundException: Remodel node hippo:prototype, current version was not found for type /hippo:namespaces/hippogallery/exampleAssetSet
at org.hippoecm.repository.standardworkflow.EditmodelWorkflowImpl.checkoutType(EditmodelWorkflowImpl.java:239)
at org.hippoecm.repository.standardworkflow.Remodeling.visitTemplateType(Remodeling.java:552)
at org.hippoecm.repository.standardworkflow.Remodeling.updateTypes(Remodeling.java:674)
at org.hippoecm.repository.standardworkflow.Remodeling.remodel(Remodeling.java:711)
at org.hippoecm.repository.standardworkflow.RemodelWorkflowImpl.remodel(RemodelWorkflowImpl.java:137)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.hippoecm.repository.impl.WorkflowManagerImpl$WorkflowInvocationHandler.invoke(WorkflowManagerImpl.java:433)
at $Proxy13.remodel(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:294)
at sun.rmi.transport.Transport$1.run(Transport.java:153)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:149)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:466)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:707)
at java.lang.Thread.run(Thread.java:595)

Using the console showed that the exampleAssetSet didn't have a hippo:prototype.