Errors:
Start tag seen without seeing a doctype first. Expected “<!DOCTYPE html>”.
Element “meta” is missing one or more of the following attributes: “content”, “property”.
Element “link” is missing required attribute “href”.
Element “img” is missing required attribute “src”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate ID “left-menu”.
Duplicate ID “right-menu”.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
The element “button” must not appear as a descendant of the “a” element.
Duplicate ID “nested-series”.
Element “a” is missing one or more of the following attributes: “aria-checked”, “role”.
Duplicate ID “packages”.
Start tag “a” seen but an element of the same type was already open.
End tag “a” violates nesting rules.
Cannot recover after last error. Any further errors will be ignored.
Warnings:
The first occurrence of ID “left-menu” was here.
The first occurrence of ID “right-menu” was here.
The first occurrence of ID “nested-series” was here.
The first occurrence of ID “packages” was here.
Empty heading.
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