Not an apex domain
The domain 3a5682463336010ef874561d4b3210e5.a3f1ace4b8ce68e06d439daadf7f6cf6.55g552y5k55bpvay5zcf.sectigo.com is not the root of its zone.
Instead, try zone transfer on sectigo.com .
Instead, try zone transfer on sectigo.com .