Error when trying to insert image in TinyMCE

Error when trying to use the dialog "upload an image, attach to the document and insert the link"

Caused by: javax.el.ELException: /editor_image_upload.xhtml @31,67 rendered="#

{!editorImageActions.inCreationMode}

": Error reading 'inCreationMode' on type org.nuxeo.ecm.webapp.note.EditorImageActionsBean_$$_javassist_76
at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:76)
at javax.faces.component.UIComponentBase.isRendered(UIComponentBase.java:390)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:924)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:933)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:933)
at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:592)
at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:100)
at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:176)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:110)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
at org.nuxeo.ecm.platform.ui.web.lifecycle.NuxeoLifeCycleImpl.render(NuxeoLifeCycleImpl.java:98)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:266)
... 57 more
Caused by: java.lang.NullPointerException
at org.nuxeo.ecm.webapp.note.EditorImageActionsBean.getInCreationMode(EditorImageActionsBean.java:184)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)