The operating system my web server runs on is (include version): DSM 7.1.1.42962 update 6
I can login to a root shell on my machine (yes or no, or I don't know): no
I'm using a control panel to manage my site (no, or provide the name and version of the control panel): no
I have a question that probably comes up often for you.
I have a Synology. I reinstalled it without remembering to set aside the certificate.
When requesting a new Let's Encrypt certificate, I forgot to include the part for obtaining a wildcard (*.example.com).
Now that I want to recreate this certificate with the wildcard, it tells me I've made too many requests, and of course, I don't want to change the domain name.
Can you help me? Can you delete this certificate so I can generate a new one?
Often enough and there is the same answer. Once you reach the limit of 5 identical certs in the past week you are blocked from getting more until they "roll off". An identical cert is one that includes the same name or set of domain names in it.
In your case you got 5 certs with your apex with a wildcard and also 5 certs with just your apex. Sadly, there is a work-around but you may have already used the most practical one.