Our website was working perfectly with no issues until yesterday. Since then, every time I make any change or edit to a page built with SP Page Builder, the page immediately breaks and shows this error: Oops... Page Not Found!

The rest of the website continues to work fine, but the specific page being edited becomes inaccessible in the frontend. To make the page visible again, I have to hide or remove the changes I just made — only then the page loads normally again.

Troubleshooting already performed • Disabled all non-essential SPPB plugins, including “SP Page Builder Pro Updater.” • Cleared Joomla and browser cache. • Tried switching templates (Flex and Cassiopeia). • Verified that no “Dynamic Content” plugin or reference remains.

Despite all this, the problem keeps coming back immediately after saving or updating a page with SP Page Builder.

Video evidence

I recorded several Loom videos showing the issue in different situations:

1. [Loom 1 – Error after editing a page: https://www.loom.com/share/13a03d1c34e1424f90b66b6d7476bf59
2. [Loom 2 – Error after editing a button: https://www.loom.com/share/fc68c18ebf894d9e832ffb4e4f6a16df
3. [Loom 3 – Error after editing and image: https://www.loom.com/share/d55c5857acc543ca8b69e103585693c0

Please review this issue and help me to get this working again.

Thank you very much for your help