When to panelPopup user add attribute resizable="true" and autoPosition="true" icefaces get an error.

<ice:panelPopup id="messageDiv" modal="true"
          visible="#{bean.showMessagePanel}"
          style="z-index:1001; width: 400px; height: 180px; top:30%; left:30%;"
          autoPosition="true" resizable="true" >

SEVERE: Servlet.service() for servlet jsp threw exception
java.lang.StringIndexOutOfBoundsException: String index out of range: -1
at java.lang.String.substring(Unknown Source)
at com.icesoft.faces.component.panelpopup.PanelPopupRenderer.encodeBegin(PanelPopupRenderer.java:241)
at javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:785)
at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:536)
at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:543)
at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:543)
at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:543)
at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:543)
at com.icesoft.faces.facelets.D2DFaceletViewHandler.renderResponse(D2DFaceletViewHandler.java:286)
at com.icesoft.faces.application.D2DViewHandler.renderView(D2DViewHandler.java:161)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:106)
at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144)
at com.icesoft.faces.webapp.http.core.JsfLifecycleExecutor.apply(JsfLifecycleExecutor.java:18)
at com.icesoft.faces.webapp.http.core.PageServer$1.respond(PageServer.java:25)
at com.icesoft.faces.webapp.http.servlet.ServletRequestResponse.respondWith(ServletRequestResponse.java:162)