Not an apex domain
The domain 1.9.0.0.0.0.0.0.0.0.0.0.0.d.f.f.f.f.f.f.f.4.5.a.0.4.0.8.2.ip6.arpa is not the root of its zone.
Instead, try zone transfer on 4.5.a.0.4.0.8.2.ip6.arpa .
Instead, try zone transfer on 4.5.a.0.4.0.8.2.ip6.arpa .