Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “type” attribute for the “style” element is not needed and should be omitted.
The “type” attribute is unnecessary for JavaScript resources.
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The “main” role is unnecessary for element “main”.
Empty heading.
Document uses the Unicode Private Use Area(s), which should not be used in publicly exchanged documents. (Charmod C073)
The value of attribute “src” on element “img” from namespace “http://www.w3.org/1999/xhtml” is not in Unicode Normalization Form C.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
Attribute “humboldt"” is not serializable as XML 1.0.
Attribute “unach"” is not serializable as XML 1.0.
The “contentinfo” role is unnecessary for element “footer”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Errors:
Element “div” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Forbidden code point U+0003.
No space between attributes.
Quote “"” in attribute name. Probable cause: Matching quote missing somewhere earlier.
Attribute “tras” not allowed on element “a” at this point.
Attribute “las” not allowed on element “a” at this point.
Attribute “huellas” not allowed on element “a” at this point.
Attribute “de” not allowed on element “a” at this point.
Attribute “humboldt"” not allowed on element “a” at this point.
Attribute “en” not allowed on element “a” at this point.
Attribute “la” not allowed on element “a” at this point.
Attribute “unach"” not allowed on element “a” at this point.
Element “p” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Element “a” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Start tag “a” seen but an element of the same type was already open.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Stray end tag “a”.
No “li” element in scope but a “li” end tag seen.
Ecuador EC