Hello, the issue you are running into are related to caching

• Clear Joomla Cache
• Clear Browser Cache
• Check that same site using 2nd (alternative) browser.
• If you have sort of Server Files cache, clear it in Hosting CPanel setting.
• Reinstall component, just in case.
• Then it should be resolved.
• Mainly It's a browser cache thing. After clearing the browser cache it will be gone.

You can check this documentation below:

https://www.joomshaper.com/documentation/sp-page-builder/troubleshooting#unhandled-runtime-error-typeerror-undefined-is-not-an-object-evaluating-i-e-call

-Regards.

Hello,

I’m sorry, but it doesn’t change anything. I truly believe there’s a correlation between a variable in the update and the site or Joomla itself, as the error suggests. I’ve tried on different browsers, as well as on different machines and operating systems, but nothing works—it’s always the same issue in the backend or frontend. However, I just noticed that this only happens on the homepage; other pages or pages using the default template open correctly both in the backend and frontend.