2015-12-09T18:13:11.575+01:00	ERROR	[Ametys.tool.ToolsManager]	Une erreur inattendue est survenue et elle a empêché l'ouverture de l'outil demandé. (TypeError: Cannot read property 'add' of null)
	TypeError: Cannot read property 'add' of null
	    at Ext.define._onEventHistoryAdded (http://localhost:9001/cms/plugins/core-ui/resources/js/Ametys/plugins/coreui/notification/NotificationTool.js:337:28)
    at null.<anonymous> (http://localhost:9001/cms/plugins/extjs6/resources/ext-all-debug.js:6662:35)
    at fire (http://localhost:9001/cms/plugins/extjs6/resources/ext-all-debug.js:20223:32)
    at doFireEvent (http://localhost:9001/cms/plugins/extjs6/resources/ext-all-debug.js:21130:47)
    at prototype.doFireEvent (http://localhost:9001/cms/plugins/extjs6/resources/ext-all-debug.js:54757:35)
    at fireEventArgs (http://localhost:9001/cms/plugins/extjs6/resources/ext-all-debug.js:20983:26)
    at fireEvent (http://localhost:9001/cms/plugins/extjs6/resources/ext-all-debug.js:20942:25)
    at Ext.define.onCollectionAddItems (http://localhost:9001/cms/plugins/extjs6/resources/ext-all-debug.js:89069:20)
    at Ext.define.onCollectionAdd (http://localhost:9001/cms/plugins/extjs6/resources/ext-all-debug.js:89015:14)
    at Ext.define.notify (http://localhost:9001/cms/plugins/extjs6/resources/ext-all-debug.js:72131:28)