Getting 403 Unauthorized Error for ACME SSL Certificate Generation (Invalid Response, 404 on Challenge URL)

[Hx-Regex]

Hi everyone,
I’m having trouble obtaining an SSL certificate for my subdomain dokploy.africkana.com via Let’s Encrypt. During the ACME challenge, I receive the following error

ERR Unable to obtain ACME certificate for domains error="unable to generate a certificate for the domains [dokploy.africkana.com]: error: one or more domains had a problem:\n[dokploy.africkana.com] acme: error: 403 :: urn:ietf:params:acme:error:unauthorized :: 2a02:4780:4b:3284:2e:7338:cf10:8a90: Invalid response from http://dokploy.africkana.com/.well-known/acme-challenge/DqJwaN40F54GiRcG6jswUw6g4o_jHJM-jkvGEBazW6I: 404\n"

It seems that the Let's Encrypt server is unable to validate the domain, getting a 404 error when trying to access the ACME challenge URL at http://dokploy.africkana.com/.well-known/acme-challenge/....

Here are a few things I’ve checked so far:

The DNS for dokploy.africkana.com is correctly pointing to my VPS IP.
Port 80 is open, and I can access my website.
I suspect the problem might be related to my server configuration, but I’m not sure where the issue lies. Could anyone provide advice on what might be causing this, or any steps I can take to resolve the issue?"