Cert renew failure - WACS

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My domain is: dmctools.com

I ran this command: wacs client, R option

It produced this output:
Please choose from the menu: R

Renewing certificate for [IIS] letsencrypt, (any host)
Authorize identifier autodiscover.dmctools.com
Authorizing autodiscover.dmctools.com using http-01 validation (SelfHosting)
"type": "urn:ietf:params:acme:error:connection",
"detail": "Fetching http://autodiscover.dmctools.com/.well-known/acme-challenge/piT6wRFEUQ7vJ74-csDqtn9XELtybSlzM_uzNMNYWNc: Timeout during connect (likely firewall problem)",
"status": 400
Authorization result: invalid
Renewal for [IIS] letsencrypt, (any host) failed, will retry on next run

My web server is (include version): IIS

The operating system my web server runs on is (include version): Windows Server 2016 Build 1607

My hosting provider, if applicable, is:

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

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot):

The renewals were working and then they stopped. Nothing has changed on the firewall. Our System admin that set this up was terminated and I am left to try and figure it out. Any help would be appreciated.

Hi @dmctools

your system is buggy, see https://check-your-website.server-daten.de/?q=dmctools.com

Domainname Http-Status redirect Sec. G
http://dmctools.com/ 301 https://dmctools.com/ Html is minified: 103,70 % 0.204 A
http://www.dmctools.com/ 301 https://www.dmctools.com/ Html is minified: 103,45 % 0.186 A
https://dmctools.com/ GZip used - 48565 / 178604 - 72,81 % 200 Html is minified: 143,08 % 8.073 B
https://www.dmctools.com/ GZip used - 48565 / 178604 - 72,81 % 200 Html is minified: 143,08 % 7.687 B
http://dmctools.com/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de -14 10.027 T
Timeout - The operation has timed out
Visible Content:
http://www.dmctools.com/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de -14 10.047 T
Timeout - The operation has timed out

http + / works. But http + /.well-known/acme-challenge/random-filename has a timeout.

Why? That's what you have to fix.

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