Hello,
The issue is not related to the patch.
Your server is hitting resource limits (CPU/RAM/entry processes), which is why the site is not loading.
Also, the warning about “WP_CRON already defined” means this constant is declared twice in your wp-config.php or by another plugin.
Please check:
– Remove duplicate DISABLE_WP_CRON definition in wp-config.php
– Contact your hosting provider to check resource usage and increase limits if needed
Best Regards