ERROR	[Ametys.data.ServerComm]	Une erreur est survenue dans le traitement de la réponse serveur (TypeError: Cannot read property 'top' of undefined)
	TypeError: Cannot read property 'top' of undefined
	    at previewGotoPage (http://localhost:39006/cms/plugins/survey/preview/survey.html?id=survey://6…ebc-b6e8-4923-a9e4-67ffa9103e69&userLocale=fr&siteName=www&skin=demo:71:86)
    at Ext.define._goToPageCb (http://localhost:39006/cms/plugins/survey/resources/js/Ametys/plugins/survey/SurveyPreviewTool.js:233:46)
    at null.<anonymous> (http://localhost:39006/cms/plugins/extjs6/resources/ext-all-debug.js:6677:35)
    at null.<anonymous> (http://localhost:39006/cms/plugins/core-ui/resources/js/Ametys/data/ServerComm.js:382:19)
    at Array.forEach (native)
    at Object.Ext.Array.ExtArray.forEach.i [as forEach] (http://localhost:39006/cms/plugins/extjs6/resources/ext-all-debug.js:3079:30)
    at Ext.define._callProcessed (http://localhost:39006/cms/plugins/core-ui/resources/js/Ametys/data/ServerComm.js:381:23)
    at null.<anonymous> (http://localhost:39006/cms/plugins/core-ui/resources/js/Ametys/data/ServerComm.js:789:29)
    at Array.forEach (native)
    at Object.Ext.Array.ExtArray.forEach.i [as forEach] (http://localhost:39006/cms/plugins/extjs6/resources/ext-all-debug.js:3079:30)