WP Preview function coming up with errors.


I've been drafting multiple pages, posts while constantly checking on 'Preview' or 'View Page' to see the progress. Everything has been working just fine for months yet just a few minutes ago, I suddenly am unable to preview any of my pages or post. An error always comes up and I don't understand why since nothing else has been changed since I installed everything.

Again, 'Preview' and 'View Page' worked great for weeks until a few minutes ago.

The error I get:

Fatal error: print_r(): Cannot use output buffering in output buffering display handlers in /home4/miracles/public_html/Website777/wp-content/plugins/wp-super-cache/wp-cache-phase2.php on line 253

Honestly doesn't make any sense and I have no clue how to fix this and why it happened in the first place. Thanks for the help and thanks again for all the help you've provided me thus far.