We are aware of an issue affecting websites utilizing EA-NGINX, where visitors may encounter a "421 Misdirected Request" error. This issue has been identified by cPanel and is related to recent updates within the EA-NGINX configuration. cPanel is currently investigating the root cause and working toward a permanent fix. In the meantime, our team is actively monitoring affected systems and will apply any recommended workarounds as they become available.
Further information can be found here: https://support.cpanel.net/hc/en-us/articles/33553346450455-Websites-show-421-Misdirected-Request-error-while-using-EA-Nginx