Error in IE11 - Failed to execute 'createElement' on 'Document': The tag name provided is not a valid name

[uriklar]

trafficstars

Issue description Console error when with IE 11 user agent in chrome

Environment

• OS name and version: MacOS Cataline

• Browser name and version: Chrome 80

Reproducing the issue

1. Go to the recaptcha demo page
2. Using chrome - open dev tools - 3 dots on the right menu - More tools - Network conditions - Set user agent to Internet Explorer 11
3. Reload page.

See console error:

Uncaught DOMException: Failed to execute 'createElement' on 'Document': The tag name provided ('<IFRAME name="a-4i3qggp3bv7">') is not a valid name.

[rowan-m]

Closing old issues that are not related to the PHP client code.