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 qr27p7m36be1v7pjal8pgqljufv693vc.letsvisualize.dk is not the root of its zone.
Instead, try zone transfer on letsvisualize.dk .
Instead, try zone transfer on letsvisualize.dk .