Frontend Editor broken on fresh Joomla installs (404 with SEF ON / 500 with SEF OFF) due to Strict Routing

For new installations, I’ve resolved this by modifying Joomla’s System SEF settings: you need to disable "strict routing."

However, this issue should primarily be addressed within the Page Builder development itself—specifically in the route.php file that handles this routing. Joomla needs to recognize that edit and edit-iframe are intended parts of the URL structure.

Hi, in my opinion, this is a combination of two issues:
The system SEF plugin—which is native to Joomla and introduced this functionality—and, almost certainly, recent security-related updates to Page Builder.

Page Builder definitely needs to fix its route.php file.

I’ve noticed that on my older sites, the Joomla update didn’t enable this feature by default; it only did so on more recent ones.

That’s correct; I’ve also compared a few sites: the setting is only enabled ('yes') on the most recently built websites, while it remains disabled ('no') on the others. They are likely conducting the test phase on older installations... As soon as testing is carried out on new installations, this issue immediately pops up. It actually forms a key foundation of the builder. That's why I find it quite remarkable the next release may not have the fix included.

I agree with you, Robert.
I have a high regard for this project, even though I did come across a few shortcomings—which I promptly reported.

Unfortunately, in this world, it’s hard to find a "perfect" project—not least because security flaws are always lurking around the corner. That said, by using PageBuilder alongside AI, I’ve managed to develop some interesting projects that are yielding great results—even in terms of GEO/SEO, which I never would have expected!

I’m confident that the issue will be fixed. After all, anyone already familiar with PageBuilder—especially those who develop multilingual sites with SEF (Search Engine Friendly) URLs enabled—will be well aware of the problem involving language suffixes. Depending on the default language setting, these can trigger 404 errors; you have to manually correct the suffix (e.g., /en or /fr) in the URL bar, otherwise the page won’t load.

You may like the video's I made about using AI and webdesign and this was about 5 months ago when I was still using Claude for a few weeks and only in chat, now using Claude Code with my terminal and have unleashed real power compared to chat :)

https://youtu.be/Q_WxyrkV7ZE?si=3kw5S3U9_cs39wpg
https://youtu.be/gjVuk4tMvF0?si=i9iDJLmpLusHGI1O

https://ibb.co/V08Vn6Y1

Have build some interesting skills to speed up workflow.

Thanks, Robert; I’ll definitely check them out.
I’m currently working on several projects. I’m not particularly fond of Claude; I prefer a different ecosystem.
One of my own projects has been running autonomously for six months now, and it’s yielding remarkable results. It’s a multi-agent system focused on the culinary world—celebrating cuisine—and includes a guided tour that also covers fine wines and craft beers. I’m quite pleased with it.
I’m also developing a number of other projects, and the ecosystem I’ve chosen is proving very rewarding—especially since, in several instances, I’ve integrated it with the Joomla APIs, and it works exactly as it should.

Cool, have build several tools for the maritime world and safety. A combination of knowhow, 35 years of experience and AI. The QHSE managers are using the tools and custom made editors now. Especially now that the forms and tools appear immediately in a modern corporate style. No need for Office anymore.