.

static/admin/index.html

@@ -16,6 +16,10 @@
   <!-- Include the script that builds the page and powers Decap CMS -->
   <script src="https://unpkg.com/decap-cms@^3.0.0/dist/decap-cms.js"></script>
   <script>
+    // Define the helper functions needed for React components
+    const h = window.React.createElement;
+    const createClass = window.createClass || window.ReactCreateClass;
+
     // Register the proper prefixed image widget
     CMS.registerWidget("prefixed-image", {
       // Control component (what editors interact with)