Not an apex domain
The domain 468559C2347ED4DECE3E10AC71615D6D.401A8B6237889C03E220386471BAE639.6XAb85Y6a355T5TdKF0N.sectigo.com is not the root of its zone.
Instead, try zone transfer on sectigo.com .
Instead, try zone transfer on sectigo.com .