Check pca object exists before interacting with it

Author: Henrik

view/frontend/templates/checkout_index_index.phtml

@@ -10,10 +10,12 @@
     requirejs(['jquery'], function(){
 
         (function() {
-            pca.magento.setupCheckout();
+            if (typeof pca !== "undefined") {
+                pca.magento.setupCheckout();
+            }
         })();
     });
 
 </script>
 
-<?php }
+<?php }