If you purchase an SSL certificate from ClouDNS, the certificate is issued by our partner Sectigo (Comodo).
If your domain uses CAA records, they must allow Sectigo to issue the certificate.
To generate the correct CAA record for your domain, please use Sectigo’s official CAA Record Generator:
domain.com. IN CAA 0 issue "sectigo.com"
domain.com. IN CAA 0 issuewild "sectigo.com"