Java Script Fehler (TypeError: Cannot read property 'nodeType' of undefined
at constructor.appendChild (http://localhost:8989/webapp/ext/build/ext-all-rtl-debug.js?_dc=20181217155022:37570:20)
at constructor.detachFromBody (http://localhost:8989/webapp/ext/build/ext-all-rtl-debug.js?_dc=20181217155022:70352:35)
at constructor.free (http://localhost:8989/webapp/ext/build/ext-all-rtl-debug.js?_dc=20181217155022:207704:20)
at constructor.onItemRemove (http://localhost:8989/webapp/ext/build/ext-all-rtl-debug.js?_dc=20181217155022:200712:25)
at constructor.fireItemMutationEvent (http://localhost:8989/webapp/ext/build/ext-all-rtl-debug.js?_dc=20181217155022:183190:59)
at constructor.clearViewEl (http://localhost:8989/webapp/ext/build/ext-all-rtl-debug.js?_dc=20181217155022:182821:12)
at constructor.callParent (http://localhost:8989/webapp/ext/build/ext-all-rtl-debug.js?_dc=20181217155022:12490:32)
at constructor.clearViewEl (http://localhost:8989/webapp/ext/build/ext-all-rtl-debug.js?_dc=20181217155022:205015:16)
at constructor.doRefreshView (http://localhost:8989/webapp/ext/build/ext-all-rtl-debug.js?_dc=20181217155022:225989:18)
at constructor.getRange (http://localhost:8989/webapp/ext/build/ext-all-rtl-debug.js?_dc=20181217155022:80225:30))