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 _c238b9a83db9205bb9a0b9e14abdffdb.app.mitienda.tigo.com.bo is not the root of its zone.
Instead, try zone transfer on nxzthgqctm.acm-validations.aws .
Instead, try zone transfer on nxzthgqctm.acm-validations.aws .