Hello!
I've encountered an issue with SP Page Builder version 5.7.1.
When editing a page using the Frontend Editor and then clicking "Close" after saving, a 404 error appears. In the browser's address bar, the URL ends with the parameter &lang=en-GB.
This issue does not occur on earlier versions of SP Page Builder — everything works as expected there.
Below is a video demonstrating the problem:
(video link in hiden content)
I kindly ask the developers to look into this bug and consider releasing a fix.
Thank you!