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I used http://validator.w3.org/check The validator fails use of role=alert on a UL tag Row 53 Column 44: Bad value alert for attribute role on element ul.<ul id="errlist" role="alert" tabindex="-1"> ✉ Test the page at http://mars.dequecloud.com/demo/form-alert2.htm I did not see this error a few months ago and am surprised why it is being flagged as role=alert is a valid role as per ARIA specs.
The <ul> element is not allowed to have role=alert. http://w3c.github.io/html-aria/#docconformance