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 k8s-ingressn-nginxing-8ace916321-6e75b0047e9675da.elb.eu-central-1.amazonaws.com is not the root of its zone.
Instead, try zone transfer on elb.eu-central-1.amazonaws.com .
Instead, try zone transfer on elb.eu-central-1.amazonaws.com .