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 marketing-production-elb-439742547.eu-west-2.elb.amazonaws.com is not the root of its zone.
Instead, try zone transfer on eu-west-2.elb.amazonaws.com .
Instead, try zone transfer on eu-west-2.elb.amazonaws.com .