Can't access HA using FQDN from WAN - CloudFlared Lets Encrypt

When connecting to my HA using an FQDN that has a certificate I get an Unable to connect to Home Assistant and retry screen, but when I use its IP address and port I can log in without any issues. I’m using the Cloudflared Integration which when I look at the tunnel on CloudFlare says “Healthy”. I’m using LetsEncrypt for my certificate. What would be causing the issue of not being able to connect?

I used these instructions to setup a few months ago–> How to configure Let's Encrypt SSL Certificates for Home Assistant completely 100% free (Updated for 2022/2023)

I have the following setup in configuration.yaml
http:
#server_port: 443
ssl_certificate: /ssl/fullchain.pem
ssl_key: /ssl/privkey.pem
ip_ban_enabled: true
login_attempts_threshold: 5
use_x_forwarded_for: true
trusted_proxies:
- 172.30.33.0/24

Hey there! I don’t check the forums very often but noticed that the instructions I wrote was mentioned in your post.

Since your post was made back in August, I wanted to see if you were able to resolve your issue.

The instructions I provided do not set up a CloudFlare tunnel. CloudFlare is only used as an DNS provider. While you can set up a CloudFlare tunnel, it is outside the scope of the original post and I have personally not had much luck setting it up.

Based on the configuration you posted, it looks like you did not properly set up the certificates that HomeAssistant is to use.