org.apache.wicket.WicketRuntimeException: Exception in rendering component: [UploadPanel [Component id = content]]

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    Root Cause Analysis

    1. org.apache.wicket.WicketRuntimeException

      Exception in rendering component: [UploadPanel [Component id = content]]

      at org.apache.wicket.Component.internalRenderComponent()
    2. Wicket Core
      RequestCycle$HandlerExecutor.respond
      1. org.apache.wicket.Component.internalRenderComponent(Component.java:2589)
      2. org.apache.wicket.MarkupContainer.onRender(MarkupContainer.java:1663)
      3. org.apache.wicket.Component.internalRender(Component.java:2380)
      4. org.apache.wicket.Component.render(Component.java:2308)
      5. org.apache.wicket.MarkupContainer.renderNext(MarkupContainer.java:1521)
      6. org.apache.wicket.MarkupContainer.renderAll(MarkupContainer.java:1724)
      7. org.apache.wicket.Page.onRender(Page.java:879)
      8. org.apache.wicket.markup.html.WebPage.onRender(WebPage.java:141)
      9. org.apache.wicket.Component.internalRender(Component.java:2380)
      10. org.apache.wicket.Component.render(Component.java:2308)
      11. org.apache.wicket.Page.renderPage(Page.java:1018)
      12. org.apache.wicket.request.handler.render.WebPageRenderer.renderPage(WebPageRenderer.java:124)
      13. org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:236)
      14. org.apache.wicket.util.tester.BaseWicketTester$LastPageRecordingPageRendererProvider$1.respond(BaseWicketTester.java:2766)
      15. org.apache.wicket.core.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:175)
      16. org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:895)
      16 frames
    3. Wicket Request
      RequestHandlerStack.execute
      1. org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
      1 frame
    4. Wicket Core
      BaseWicketTester.startComponentInPage
      1. org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:265)
      2. org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:222)
      3. org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:293)
      4. org.apache.wicket.util.tester.BaseWicketTester.processRequest(BaseWicketTester.java:714)
      5. org.apache.wicket.util.tester.BaseWicketTester.processRequest(BaseWicketTester.java:653)
      6. org.apache.wicket.util.tester.BaseWicketTester.startPage(BaseWicketTester.java:883)
      7. org.apache.wicket.util.tester.BaseWicketTester.startPage(BaseWicketTester.java:900)
      8. org.apache.wicket.util.tester.BaseWicketTester.startComponentInPage(BaseWicketTester.java:1462)
      9. org.apache.wicket.util.tester.BaseWicketTester.startComponentInPage(BaseWicketTester.java:1382)
      9 frames