We were building a site with DIVI, and we noticed we the builder would lock up. We would have to reload the page and get back into the builder, and this was causing us a bunch of time. A quick search got us to the page where Elegant themes describing what they would do. Here is the page.

https://divi.space/divi-tutorials/how-to-fix-the-divi-builder-timeout-error-on-your-wordpress-website/

Our PHP was up to date, but our limits needed to be raised. After they were raised and our XXAMP was restarted the site was much easier to work with.

Let us know if this helped you…