What is that RAW Content shortcode that full of random characters at the bottom of your page (before the slider)? That seems to be incomplete and messing your lower page HTML markup. Please address that.
And why not build your page in Cornerstone? Building the page with shortcodes (or pure HTML markup) will get you on this kind of issue.
Cornerstone / Content Builder - Introduction
And it seems your site is reaching its PHP limit. You can try adding this to your wp-config.php file located in the root directory of your site.
define( 'WP_MEMORY_LIMIT', '512M' );
define( 'WP_MAX_MEMORY_LIMIT', '512M' );
You can add it before the line:
/* That’s all, stop editing! Happy blogging. */
Or you can deactivate the plugins that you're not using to reduce the load of your site.
And please clear and deactivate your caching while we troubleshoot this issue.