Error creating certificate in Nginx Proxy Manager [Solved]

I'm trying to create a certificate using NPM (Nginx Proxy Manager), version 2.9.1, I managed to create it 2 days ago and now it's giving an error. The same thing happened with a friend.

Oracle server running Ubuntu 20.04
Ports 80 and 443 are open, DNS responding normally.

Here you can have more information about the error log:

The domain I tried to create is and (for testing)

Hello @talesam,

Did you try to issue the certificate again? I'm asking because around the time you tried to issue the certificate there was an incident related to Let's Encrypt API


Hello, I tried to do it about 15 minutes ago and my friend also in his cervidor and the same error.

So you are still receiving the same internal error?

2021-10-17 03:30:02,664:DEBUG:acme.client:Received response:
HTTP 500
Server: nginx
Date: Sun, 17 Oct 2021 03:30:02 GMT
Content-Type: application/problem+json
Content-Length: 116
Connection: keep-alive
Boulder-Requester: 236307560
Cache-Control: public, max-age=0, no-cache
Link: <>;rel="index"
Replay-Nonce: 0001vt83m1y7AG3kg64E8-epcogpMvrutofEfmOlcqnRg2Y

  "type": "urn:ietf:params:acme:error:serverInternal",
  "detail": "Unable to update challenge",
  "status": 500
1 Like

@talesam Two things. At github you were asking about rate limits. If you reach those you will get an appropriate error message - not an http 500. I looked at your cert history and do not see any problem with rate limit.

Also, right now I cannot reach your server on port 80. This would cause a different error when trying to issue or renew your LE cert.

curl -I

HTTP/1.1 502 Bad Gateway
Server: openresty
Date: Sun, 17 Oct 2021 16:45:43 GMT
Content-Type: text/html
Content-Length: 154
Connection: keep-alive

I cannot explain your original http 500 error. That looks like a fault with the LE servers - usually those are temporary.

it looks like it was a glitch in the LE servers, I just created the certificate now, thanks.


This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.