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 pgmn95jq9o8rprogjd6o2kunav4kmeg1.builder.nu is not the root of its zone.
Instead, try zone transfer on builder.nu .
Instead, try zone transfer on builder.nu .