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 _8c05b1c35cdca7a3fcabd8c17e588dd1.harcourts.fliva.com is not the root of its zone.
Instead, try zone transfer on jkddzztszm.acm-validations.aws .
Instead, try zone transfer on jkddzztszm.acm-validations.aws .