Nothing to panic about, these is a very common cause for this.
In the error message, in addition to reaching out to support there is a log file it suggests you check.
At the bottom of that log will be the most recent notices. Commonly, you will see this:
1 renew failure(s), 0 parse failure(s)
- The following errors were reported by the server:
Detail: DNS problem: NXDOMAIN looking up A for
www.yourdomain.com - check that a DNS record exists for this domain
What this means is that when you provisioned this SSL certificate, you were given a certificate for both domain.com and www.domain.com because that is what certbot saw at the time. Since the DNS record for www has been removed. Since an SSL must be renewed with the same records as it was provisioned with, it throws an error.
Solution: Create a DNS record for www
If for some reason you do not want to have www on your certificate, you can also remove the existing SSL and provision another one.