Google is emailing Chromecast users today to apologize for an issue that’s been causing certain Chromecast models to fail when people try to cast to them. The company says that it’s working on a fix.

Below is the text from the email, which some Verge staffers received, titled, “Important information about your Chromecast.”

We’re contacting you because of a disruption affecting Chromecast (2nd gen) and Chromecast Audio devices. We apologize for the issue and understand your frustration. We are working to roll out a fix as soon as possible and will share updates and guidance on the Nest Community page. We appreciate your patience as we resolve this issue.

Chromecasts started failing over the weekend, giving “Untrusted device” errors on the devices that users were trying to cast with. When The Verge reached out, Google acknowledged that it was aware of the issue and said it would share more information as it was available.

Yesterday, a Google Nest Community Manager said that the team has “identified the cause of the issue” and that it was working on a fix.

Google hasn’t said what caused the issue, but one Reddit user claimed that it was “most definitely due to the certificate baked into the Chromecast having expired.” The user said that the certificate specified that it was no longer valid after March 9th, 2025, which was the day before the Chromecast models started failing.