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 207-20-36-32-compute-ag2-ash01.opsourcecloud.net is not the root of its zone.
Instead, try zone transfer on opsourcecloud.net .
Instead, try zone transfer on opsourcecloud.net .