As the error message says, the DNSSEC for your domain is not working properly. CAA records need to be checked in order to issue a certificate, and while it's fine to not have CAA records, the DNS server needs to correctly return that it doesn't have any records rather than returning erroneous data. See the "CAA Errors" section of the Let's Encrypt documention:
This is something that only your DNS provider can fix (or by switching to a DNS provider that knows what they're doing). And if you're using Network Solutions as your DNS provider, many people have found that they don't know how to run a DNS server.