Locked field in the W-8BEN tax form

I'm a tax resident of the Netherlands and have a Ukrainian citizenship. The field "Country or Region of Citizenship" is locked and prefilled with "Netherlands". I don't want to provide incorrect information and still waiting for the support answer. This is obviously a bug. How can I change it? I've seen some similar posts, but there is no useful answers.

Locked field in the W-8BEN tax form
 
 
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