Error 403 when reverse proxied with caddy

[Minecodes]

Hi,
I just came back to my web server and saw numerous problems. One of them is very likely originating from Anubis. When I go on my website, it responds with the error 403 (forbidden). I just checked my Docker container, and there appears to be no issue with it. Sadly, I couldn't test other subdomains where I also use Anubis because my web server (Caddy) decided to give back a TLS v1.0 connection instead of the set-up TLS v1.3.

If someone has some ideas about how I could debug this mess, then please reply. I even tried to switch to a newer Caddy build and deleted all certificates. Fortunately, it doesn't impact every domain or subdomain. Thank you in advance.

PS: For reference, it's the website in my GH profile, and the subdomain git is an example.