xml - Why am I getting this error about XML Declaration?

Question

This page contains the following errors: error on line 1 at column 6: XML declaration allowed only at the start of the document

This is what Google Chrome is showing me when the XML data is this:

  <?xml version="1.0" encoding="UTF-8"?>
  <tbl Src="JD-API">
    <cols>
      <col ID="0"Nam="ID" Typ="3" Wid="50" />
      <col ID="1"Nam="Text" Typ="1" Wid="50" />
    </cols>
    <rows>
    </rows>
  </tbl>

Why is it telling me this and what does it mean?

Answer 1

<?xml宣言の前にある先頭の空白を削除します。