Prevent errors when CA has no data

app/assets/javascripts/cycle_analytics/cycle_analytics_bundle.js

@@ -17,6 +17,7 @@ Vue.use(Translate);
 
 export default () => {
   const OVERVIEW_DIALOG_COOKIE = 'cycle_analytics_help_dismissed';
+  const cycleAnalyticsEl = document.querySelector('#cycle-analytics');
 
   // eslint-disable-next-line no-new
   new Vue({
@@ -33,7 +34,6 @@ export default () => {
       'stage-production-component': stageComponent,
     },
     data() {
-      const cycleAnalyticsEl = document.querySelector('#cycle-analytics');
       const cycleAnalyticsService = new CycleAnalyticsService({
         requestPath: cycleAnalyticsEl.dataset.requestPath,
       });
@@ -56,7 +56,13 @@ export default () => {
       },
     },
     created() {
-      this.fetchCycleAnalyticsData();
+      // Conditional check placed here to prevent this method from being called on the
+      // new Cycle Analytics page (i.e. the new page will be initialized blank and only
+      // after a group is selected the cycle analyitcs data will be fetched). Once the
+      // old (current) page has been removed this entire created method as well as the
+      // variable itself can be completely removed.
+      // Follow up issue: https://gitlab.com/gitlab-org/gitlab-ce/issues/64490
+      if (cycleAnalyticsEl.dataset.requestPath) this.fetchCycleAnalyticsData();
     },
     methods: {
       handleError() {