line 1 column 1 - Access: [3.3.1.1]: use style sheets to control presentation.
line 4 column 1 - Access: [13.2.1.1]: Metadata missing.
line 10 column 9 - Access: [6.5.1.2]: <noframes> section invalid (no value).
line 9 column 9 - Access: [12.1.1.1]: <frame> missing title.
line 10 column 9 - Warning: trimming empty <noframes>
Tidy found 1 warning and 0 errors!

For further advice on how to make your pages accessible
see https://www.w3.org/WAI/GL and https://www.html-tidy.org/accessibility/.
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.