I fixed it on my website!
The problem was the debug mode in W3TC. Switched it off and it works again.
I’ve got the same problem since a couple of days. It’s not the theme and i also tested with all plugins disabled. Anyone knows what the solution is?
I had s similar problem, i got to see the first screen of a WordPress installation after changing this setting.
When i put the wp-config.php file permission to 777 when i made the change, everything seemed to go without any problems. Don’t forget to change it back 644 after you’re done 😉
Maybe it also prevents your problem next time.
I have the same problem and i also can’t find it on your page Joost.
