Google is rolling out a fix for Chromecast device issues that left many users with “untrusted device” errors that disabled casting.

The issue, which appeared over the weekend, seemed to widely affect Chromecast 2nd generation and Chromecast Audio devices. Google has not said what caused the errors, but a user on Reddit claimed it could be because the certificate baked into the devices expired.

“We have started to roll out a fix for the problem with Chromecast (2nd gen) and Chromecast Audio devices, which will be completed over the next few days,” Google says in a support post. “Your device must be connected to receive the update.”

However, if you attempted a factory reset, Google says that “you may still be experiencing an issue where you cannot re-setup your device.” The company says that it’s “working to resolve this as soon as possible” and to watch the support post for updates. If you’re in this situation, a user on Reddit has shared steps you can try while you wait for Google’s official fix.

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