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 ns372436.ip-188-165-196.eu is not the root of its zone.
Instead, try zone transfer on ip-188-165-196.eu .
Instead, try zone transfer on ip-188-165-196.eu .