SmartCrawl + DIVI = Broken Website

Hey guys so all my sites that have SmartCrawl and Divi theme installed have broken. I can login to the dashboard and see pages and posts. This was working until recently.

I just cannot see the home page or the blog page. It loads but is just a blank page.

I queried my host and they replied with this:

Following are the error logs on the server;

[client] PHP Fatal error: ob_start(): Cannot use output buffering in output buffering display handlers in /var/www/volumes/xvdf1/vhosts/ on line 1003

Any help would be awesome.

I have 15 sites that are suffering the same fate. I really like the SmartCrawl plugin and don't want anything to do with YOAST lol.