Windows 11 Pro ETC NOMAD IP address change.

So I followed the instructions from this: support.etcconnect.com/.../How_to_Change_IP_Address_on_Windows_10_for_Use_with_ETC_Networks
The only thing I don't fill out is The perferred DNS section since it says to leave it blank.
But what I get when I try to save it says: Can't save IP setting. Check one or more settings.
What am I missing?

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