In that case, please give us access to your WordPress Admin and FTP in a Secure Note so we could check what else is causing the issue.
Nothing is messed up badly. In most cases, the issue is a result of third party factors such us optimizations, customizations and plugin conflicts. The updates released are fixes for bugs that have not been discovered during testing. For more details about the known issues, please see our latest Release Notes at https://theme.co/apex/forum/t/release-notes-pro-2-3-x-6-3-cornerstone-3-3/44607
@smb123, @PanInternational, and @DeeDesign,
I kindly ask for you to open a separate thread and post a link to this thread for reference. That is because though the issue you face is similar to this thread, the cause might be different so the solution we provide in this thread might not work for you and we might ask for WordPress site and server access and if you post them here, the original poster could see it. It's also stated in our How to Get Support article that hijacking of threads is not allowed.
Before you open a separate thread, please try the other possible solutions listed below:
If you're using a CDN, please clear the CDN's cache and disable optimization services.
Test for a plugin conflict. You can do this by deactivating all third party plugins, and seeing if the problem remains. If it's fixed, you'll know a plugin caused the problem, and you can narrow down which one by reactivating them one at a time.
Reset your htaccess file by renaming it to
.htaccess-bak. Then in WP Admin Menu, go to Settings > Permalinks and just click the Save Changes button.
Contact your host to increase your allocated memory or do it yourself by adding this code in your wp-config.php
define( 'WP_MEMORY_LIMIT', '256M' );
define( 'WP_MAX_MEMORY_LIMIT', '512M' );