Hi @Kirk Hansen ,
Welcome to Microsoft Q&A!
Your XML file is invalid.
Please click on “Use XML editor to view and edit the underlying XML Schema file” to edit your XML Schema file. You can bind xmlns to the namespace name: http://www.w3.org/2001/XMLSchema.
<schema
xmlns='http://www.w3.org/2001/XMLSchema'
Then, drag the XSD file again.
Sincerely,
Anna
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