ERROR	[Ametys.data.ServerComm]	Une erreur est survenue dans le traitement de la réponse serveur (TypeError: Cannot read property 'isEmptyStore' of null)
	TypeError: Cannot read property 'isEmptyStore' of null
	    at Ext.define.getValue (http://localhost:39006/cms/plugins/extjs6/resources/ext-all-debug.js:172357:19)
    at Ext.define._loadSkinsCb (http://localhost:39006/cms/plugins/web/resources/js/Ametys/web/form/widget/SelectSkin.js:202:39)
    at null.<anonymous> (http://localhost:39006/cms/plugins/extjs6/resources/ext-all-debug.js:6662:35)
    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)