Is my ip blocked?

I'm using nginx-proxy to create let's Encrypt certification since several month.
I just try on a test server with a random ip, and all works great.
Now I want to use it on my ip but I can't verify acme-challenge.
My proxy give me the error:

" error: Invalid response from 404

I use this ip for dev, but I can't validate ssl since months, Is my ip blocked ?

My domain is:

It produced this output:
[Wed Sep 21 15:20:05 UTC 2022] Getting webroot for domain=''
[Wed Sep 21 15:20:05 UTC 2022] Verifying:
[Wed Sep 21 15:20:08 UTC 2022] error: Invalid response from 404

My web server is (include version):

The operating system my web server runs on is (include version):
debian 11

I can login to a root shell on my machine (yes or no, or I don't know):

I'm using a control panel to manage my site (no, or provide the name and version of the control panel):

No, this has nothing to do with IP blocks. A 404 file not found error usually means the webserver is not properly configured.


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