Acme error - invalid response from http://miapp.dev.mydomain.com/.well-known/acme-challenge/

[ElmerVelazquez]

Hi,

I’m having an issue with the Zoraxy ACME feature. I tried using the wizard tool, but it’s not working. The logs show the following:

[2025-12-09 01:55:05.193687] [ACME] [system:info] Obtaining certificate for: miapp.dev.mydomain.com
[2025-12-09 01:55:05.193697] [ACME] [system:error] Could not extract SANs from PEM, using domainPara onl
y: open ./conf/certs/miapp.dev.mydomain.com .pem: no such file or directory
[2025-12-09 01:55:05.193710] [ACME] [system:info] Using https://acme-v02.api.letsencrypt.org/directory f
or CA Directory URL
[2025-12-09 01:55:12.108218] [ACME] [system:error] Obtain certificate failed: error: one or more domains
had a problem:
[miapp.dev.mydomain.com] invalid authorization: acme: error: 403 :: urn:ietf:params:acme:error:u
nauthorized :: 46.250.169.111: Invalid response from http://miapp.dev.mydomain.com/.well-known/a
cme-challenge/3DmhzZMokhag0Aw25zlTJTtA5HZCUYBiK1AbbuR4nPY: 404

Any ideas? From what I can see, Zoraxy is forwarding the ACME challenge request to the upstream application, which returns a 404 HTML page instead of serving the challenge file.