ENGCOM-3154: [Backport] Checkout - Fix 'Cannot read property 'code' on undefined' issue #18495

 - Merge Pull Request #18495 from ihor-sviziev/magento2:checkout-fix-cannot-read-property-code-of-undefined
 - Merged commits:
   1. e7f70ab
   2. 25e3cfe

Author: magento-engcom-team

app/code/Magento/Checkout/view/frontend/web/js/view/progress-bar.js

@@ -24,11 +24,17 @@ define([
 
         /** @inheritdoc */
         initialize: function () {
+            var stepsValue;
+
             this._super();
             $(window).hashchange(_.bind(stepNavigator.handleHash, stepNavigator));
 
             if (!window.location.hash) {
-                stepNavigator.setHash(stepNavigator.steps().sort(stepNavigator.sortItems)[0].code);
+                stepsValue = stepNavigator.steps();
+
+                if (stepsValue.length) {
+                    stepNavigator.setHash(stepsValue.sort(stepNavigator.sortItems)[0].code);
+                }
             }
 
             stepNavigator.handleHash();