The dashboard did not load

If “Open directly” works but this page does not, the web app was deployed without ALLOWALL frame options — redeploy a new version of the script.

Setup needed

Add your web app URL

This page is a shell. It needs the address of the Apps Script web app that reads your spreadsheet.

In the Apps Script editor: Deploy › Manage deployments, copy the Web app URL (it ends in /exec).
Open index.html and replace PASTE_YOUR_EXEC_URL_HERE with that URL, keeping the quote marks.
Re-upload the folder to Cloudflare Pages.