Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Attribute “<span” is not serializable as XML 1.0.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
Errors:
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Bad value “100%” for attribute “width” on element “iframe”: Expected a digit but saw “%” instead.
Bad value “100%” for attribute “height” on element “iframe”: Expected a digit but saw “%” instead.
Attribute “webkitallowfullscreen” not allowed on element “iframe” at this point.
Attribute “mozallowfullscreen” not allowed on element “iframe” at this point.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Saw “<” when expecting an attribute name. Probable cause: Missing “>” immediately before.
Attribute “<span” not allowed on element “span” at this point.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “http://thethingsnetwork.us11.list-manage.com/subscribe?u=20406705fec6d7d4b2ab1d6cc&id=0b4108dfeb&group[1][1]=1” for attribute “href” on element “a”: Illegal character in query: “[” is not allowed.
Attribute “alt” not allowed on element “div” at this point.
Bad value “mailto:wienke@thethingsnetwork.org?subject=I would like to join the team” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
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