Not an apex domain
The domain 4CDBFB4585BDBDEE91D110F747BE6F84.E35BC49C559C1A3E8714950AE020DD69.3Bp5ybSwmw5knSlK55q6.sectigo.com is not the root of its zone.
Instead, try zone transfer on sectigo.com .
Instead, try zone transfer on sectigo.com .