If you are attempting to update the nameservers of a domain and are receiving an error like "Unexpected RCODE (target\\, entity\\, RCODE)", this means that the new nameservers are failing the registry required nameserver validation check.
You can enter your domain and the desired nameservers in the following registry tool to determine the errors causing the update to fail.
If you continue to have issues, please reached out to our Customer Care and we can try to explain the error messages and how they should be resolved.
Note: If you are using third-party nameservers, we recommend contacting their support team regarding the errors that are shown by the registry tool.