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 _50b8ccd4139534fdee8f55536a3558df.radius.irax.com is not the root of its zone.
Instead, try zone transfer on auiqqraehs.acm-validations.aws .
Instead, try zone transfer on auiqqraehs.acm-validations.aws .