Validation keeps prompting me with error a million times

My code validation says: Error Line 7, Column 140: Bad value http://fonts.googleapis.com/css?family=Changa+One|Open+Sans:400italic,700italic,400,700,800 for attribute href on element link: Illegal character in query: not a URL code point. …ne|Open+Sans:400italic,700italic,400,700,800' rel='stylesheet' type='text/css'> Syntax of URL: Any URL. For example: /hello, #canvas, or http://example.org/. Characters should be represented in NFC and spaces should be escaped as %20.

Everytime I Revalidate after copying and paste it again and again it keeps prompting me with error in line 7 but funny is the number of the column is changing all the time, firs was Line 7 and column 94, then 132 now 140 and so on.. I checked the code million times. I don´t know what´s wrong

Any help is appreciated. Here the code

html

  <link href='http://fonts.googleapis.com/css?family=Changa+One|Open+Sans:400italic,700italic,400,700,800' rel='stylesheet' type='text/css'>

Next thing a warning:

Warning Line 27, Column 15: Section lacks heading. Consider using h2-h6 elements to add identifying headings to all sections. <section>

Here s the code:

html

</header>
    <div id="wrapper">
      <section>
     <ul id="gallery">
      <li>

What´s the issue here?