Configuration of Cloudflare

following the domhouse.it guide, I purchased a domain on aruba.it for 1.90 (the first year), I created an account on cloudflare, I set the DNS that cloudflare gave me on aruba. I then edited the configuration.yaml file and under the http: section I entered

use_x_forwarded_for: true
trusted_proxies:
- 172.30.33.0/24.

I installed the cloudflare component on the HA in which configuration I inserted my domain on Aruba, I copied the tunnel ID and, after eliminating all the cloudflare DNS entries (as domhouse recommended in the guide), I created a CNAME, @ (root), ID of the tunnel to which I added .cfargotunnel.com at the end.
I clicked on refresh on the Log tab of the cloudflare component and it gives me this error

2023-11-16T16:26:14Z ERR error="Unable to reach the origin service. The service may be down or it may not be responding to traffic from cloudflared: EOF" cfRay=***-MRS event=1 ingressRule=0 originService=http://homeassistant:8123
2023-11-16T16:26:14Z ERR Request failed error="Unable to reach the origin service. The service may be down or it may not be responding to traffic from cloudflared: EOF" connIndex=3 dest=https://* **/ event=0 ip=*** type=http

While if I try to connect by entering h_ttps://mydomain it gives me the screen I attach:

Would anyone like to help me resolve this?
Thanks and bye

What does the (core) log for HA say?

Hi Tinkerer, thanks for your reply, I just solved the iusse. I deleted in configuration.yaml the voices

  ssl_certificate: /ssl/fullchain.pem
  ssl_key: /ssl/privkey.pem

and now all work fine.
I don’t remember why I inserted these two lines in the configuration.yaml, but for now everything seems to work fine.
Thanks again and ciao from Italy