<ul><li>The second-generation Chromecast is facing authentication errors due to an expired certificate authority.</li><li>As a temporary solution, users can bypass device authentication by setting their phone’s date back to March 8, 2025.</li><li>Google is aware of the issue and is working on fixing it. Users are advised not to factory reset their non-functional Chromecasts.</li><li>The intermediate CA issued by Google for second-generation Chromecasts has expired, causing validation failures during setup.</li></ul>

Here’s how you can fix Chromecast authentication errors before Google does

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