Added a null and length check for pages before trying to modify their elements.

ignite-template.js

@@ -2735,8 +2735,10 @@ class pagination extends IgniteTemplate {
         }
 
         //Show the elements in the current page
+        if (this.pages && this.pages.length > 0) {
             this.pages[this.currentPage].forEach(item => item.style.removeProperty("display"));
         }
+    }
 
     construct(parent, sibling) {
         //Don't construct if we have no parent, no sibling and no element.