I'm on Cloudflare's Pro Service. I've created a custom page for "Always On" and 500 Custom errors. However, when I mimic an error on the server creating a 500 error I see the server error message rather than Cloudflare's error page that I created. How do I configure Cloudflare to handle all HTTP 5XX error pages?
Some information on my server:
Server 2016 hosted on an internal network Error Page I see is the internal windows error page.