Changes since SOA version
IXFR is a zone transfer request that returns changes since a specific SOA version. Enter the SOA version to request changes since then.
Not an apex domain
The domain nfpg53jin7a0e4bfmq4ui6go4kpkf768.vjm.dk is not the root of its zone.
Instead, try zone transfer on vjm.dk .
Instead, try zone transfer on vjm.dk .