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 ip185.ip-145-239-103.eu is not the root of its zone.
Instead, try zone transfer on ip-145-239-103.eu .
Instead, try zone transfer on ip-145-239-103.eu .