Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Bad value “https://fonts.googleapis.com/css?family=Muli:200,200i,300,300i,400,400i,600,600i,700,700i,800,800i,900,900i|Roboto:100,100i,300,300i,400,400i,500,500i,700,700i,900,900i” for attribute “href” on element “link”: Illegal character in query: “|” is not allowed.
End tag “div” seen, but there were open elements.
Unclosed element “ul”.
Duplicate ID “lang_choice_1”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “designer” for attribute “rel” on element “a”: The string “designer” is not a registered keyword.
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
The “banner” role is unnecessary for element “header”.
The first occurrence of ID “lang_choice_1” was here.
Document uses the Unicode Private Use Area(s), which should not be used in publicly exchanged documents. (Charmod C073)
The “navigation” role is unnecessary for element “nav”.
The “article” role is unnecessary for element “article”.
The “main” role is unnecessary for element “main”.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The “contentinfo” role is unnecessary for element “footer”.
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