The problem is back. I have now installed a fresh Joomla 5.x and then SP Page Builder Pro on it to do the whole thing with the error code "Request Failed With Status Code 403" on a new page without a quick start installation.

So I installed a new Joomla installation and installed SP Page Builder 5.4.4 there. I then created a new page called "start" with the page builder. I then created a new section there and saved the page - which worked great.

Then I inserted the "Heading" add-on into this section using drag 'n drop and wanted to save the page. I immediately got the message "Request Failed With Status Code 403".

I had previously edited the .htaccess to insert the values ​​"ecFilterEngine Off" and "SecFilterScanPOST Off" to turn off ModSecurity. I really need serious support with this now because I have to move a project forward and if it no longer works with SP Page Builder Pro, I will have to look for another software.