You may have not understood me correctly. I have ONLY installed the 3 plugins recommended by the theme. I’ve installed them in sequential order as I encountered this problem earlier. I decided to install fresh WP, then installed Integral Lite and then 1st the Redux plug-in. After checking the site could be reached I installed Contact Form 7. Still the site could be reached. After that I installed Theme Demo Import and then the error occurred.
Again no other plug ins are installed