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 ae84a652738584bfb999008c9cce6146-1740f2dec71ae7b7.elb.us-east-1.amazonaws.com is not the root of its zone.
Instead, try zone transfer on elb.us-east-1.amazonaws.com .
Instead, try zone transfer on elb.us-east-1.amazonaws.com .