ATLAS-932: UI: 'create tag' button does not work - when there are no tags in the store

dashboardv2/public/js/views/tag/CreateTagLayoutView.js

@@ -57,7 +57,7 @@ define(['require',
              */
             initialize: function(options) {
                 _.extend(this, _.pick(options, 'tagCollection', 'tag', 'termCollection', 'descriptionData'));
-                if (this.tagCollection && this.tagCollection.first().get('traitTypes')) {
+                if (this.tagCollection && this.tagCollection.length > 0 && this.tagCollection.first().get('traitTypes')) {
                     this.description = this.tagCollection.first().get('traitTypes')[0].typeDescription;
                 } else if (this.termCollection) {
                     this.description = this.descriptionData;