Errors:
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Element “li” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
End tag “br”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate ID “nl_order_single_form”.
Duplicate ID “nl_single_form_error”.
Element “img” is missing required attribute “src”.
Bad value “100%” for attribute “width” on element “iframe”: Expected a digit but saw “%” instead.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Duplicate ID “hpstories”.
Duplicate ID “6066426”.
Bad value “https://twitter.com/share?url=https%3A%2F%2Fwww.horizont.net%2Fmarketing%2Fkommentare%2Ffleishman-hillard-sind-influencer-die-neuen-testimonials-173061&text=HORIZONT - Zitat des Tages” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “https://www.xing.com/app/user?op=share;url=https%3A%2F%2Fwww.horizont.net%2Fmarketing%2Fkommentare%2Ffleishman-hillard-sind-influencer-die-neuen-testimonials-173061;title=HORIZONT - Zitat des Tages” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Duplicate ID “hppua”.
“"” in an unquoted attribute value. Probable causes: Attributes running together or a URL query string in an unquoted attribute value.
Bad value “\"/abo/\"” for attribute “href” on element “a”: Backslash ("\") used as path segment delimiter.
Quote “"” in attribute name. Probable cause: Matching quote missing somewhere earlier.
Attribute “fa-angle-right\"” not allowed on element “i” at this point.
No space between attributes.
Saw “"” when expecting an attribute name. Probable cause: “=” missing immediately before.
Attribute “"” not allowed on element “a” at this point.
Warnings:
The value of attribute “content” on element “meta” from namespace “http://www.w3.org/1999/xhtml” is not in Unicode Normalization Form C.
The “type” attribute is unnecessary for JavaScript resources.
The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “nl_order_single_form” was here.
The first occurrence of ID “nl_single_form_error” was here.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The first occurrence of ID “hpstories” was here.
The first occurrence of ID “6066426” was here.
The first occurrence of ID “hppua” was here.
Empty heading.
Attribute “fa-angle-right\"” is not serializable as XML 1.0.
Attribute “"” is not serializable as XML 1.0.
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