line 3 column 1 - Error: repeated FRAMESET element
line 21 column 3 - Warning: content occurs after end of body
line 21 column 3 - Warning: replacing <body> with <div>
line 21 column 3 - Warning: trimming empty <div>
line 20 column 2 - Warning: trimming empty <noframes>
line 19 column 1 - Warning: trimming empty <frameset>
Info: Doctype given is "-//W3C//DTD HTML 4.01 Frameset//EN"
Info: Document content looks like HTML 4.01 Frameset
Tidy found 5 warnings and 1 error!

This document has errors that must be fixed before
using HTML Tidy to generate a tidied up version.

One or more empty elements were present in the source document but
dropped on output. If these elements are necessary or you don't want
this behavior, then consider setting the option "drop-empty-elements"
to no.

About HTML Tidy: https://github.com/htacg/tidy-html5
Bug reports and comments: https://github.com/htacg/tidy-html5/issues
Official mailing list: https://lists.w3.org/Archives/Public/public-htacg/
Latest HTML specification: https://html.spec.whatwg.org/multipage/
Validate your HTML documents: https://validator.w3.org/nu/
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Do you speak a language other than English, or a different variant of 
English? Consider helping us to localize HTML Tidy. For details please see 
https://github.com/htacg/tidy-html5/blob/master/README/LOCALIZE.md
