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 fxx3._domainkey.wicom-telefonica.com is not the root of its zone.
Instead, try zone transfer on p436.email.myshopify.com .
Instead, try zone transfer on p436.email.myshopify.com .