My domain is: thegriswoldcloud.synology.me
My web server is (include version): Synology DS220+ - DSM 6.2.3-25426 Update 3
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): Yes
Welcome to the Let's Encrypt Community, Dennis 
Start here (the official instructions are there in a link at the top):
Hi @dgriswold94
that's not your domain, that domain isn't registered - see thegriswoldcloud.synology.me - Make your website better - DNS, redirects, mixed content, certificates
| Host | Type | IP-Address | is auth. | ∑ Queries | ∑ Timeout |
|---|---|---|---|---|---|
| thegriswoldcloud.synology.me | Name Error | yes | 1 | 0 | |
| www.thegriswoldcloud.synology.me | Name Error | yes | 1 | 0 |
Crt.sh shows an old certificate - crt.sh | thegriswoldcloud.synology.me - from 2020-08-04.
So you can't create a certificate.
First step: Check your DSM / your Synology account to register that subdomain. Then the DSM has integrated solutions to create Letsencrypt certificates.
PS: thegriswoldcloud looks like a typo. But thegrisworldcloud isn't registered too.
Thank you both for the help on this! The link provided solved all issues.
This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.