****UPDATE: ISSUE SOLVED****
This issue has been solved by the OS 8.4.10 update.
The update was released on November 23, 2021.
See Brandon's pinned comment below for more information
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We use Google Slides to populate a couple of content windows using the HTML5 Widget and for months it has behaved wonderfully
Yesterday every unit began displaying a google troubleshooting window in both of the HTML5/Google slides content window with a "Clear Cache & Cookies" error (below).
We are trying to identify what may have changed but I thought I would reach out to the community to see if someone has had the same issue and may have some advice. We are basic users of the system.
My thanks
Steven