Got an errors when running using the google validator.w3.org

Here are the lists of errors: Info: The Content-Type was text/html. Using the HTML parser. Info: Using the schema for HTML with SVG 1.1, MathML 3.0, RDFa 1.1, and ITS 2.0 support. Error: Bad value https://fonts.googleapis.com/css?family=Changa+One|Open+Sans:400,400italic,700,700italic,800 for attribute href on element link: Illegal character in query: not a URL code point. From line 7, column 5; to line 7, column 143 css">↩ <link href='https://fonts.googleapis.com/css?family=Changa+One|Open+Sans:400,400italic,700,700italic,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. Warning: Section lacks heading. Consider using h2-h6 elements to add identifying headings to all sections. From line 26, column 7; to line 26, column 15 r">↩ <section>↩