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 hm6fkh6m16d5mc5jmr2bev3gvqp4mkf5.vjm.dk is not the root of its zone.
Instead, try zone transfer on vjm.dk .
Instead, try zone transfer on vjm.dk .