I was not able to get into the Visual Builder of the Divi theme, and they had me talk to my hosting provider and confirm that my hosting server had PHP 5.6 or greater, MySQL 5.5 or greater, The mod_rewrite Apache module; which it does for all, and then ask them to set the PHP directives to
which they did
and finally to set
in the .htaccess hidden file.
Once those things were done, I was able to use Visual Builder again.