Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Attribute “type” not allowed on element “iframe” at this point.
Bad value “true” for attribute “allowfullscreen” on element “iframe”.
No “p” element in scope but a “p” end tag seen.
Bad value “BerryIMU wiring” for attribute “id” on element “h2”: An ID must not contain whitespace.
The “align” attribute on the “p” element is obsolete. Use CSS instead.
Duplicate ID “post-5814”.
Duplicate ID “post-5654”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate ID “attachment_5506”.
Duplicate ID “attachment_5513”.
Duplicate attribute “rel”.
Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
Warnings:
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
Empty heading.
The first occurrence of ID “post-5814” was here.
The first occurrence of ID “post-5654” was here.
The first occurrence of ID “attachment_5506” was here.
The first occurrence of ID “attachment_5513” was here.
The “contentinfo” role is unnecessary for element “footer”.
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).
United States US