Yours works Chromecast no longer properly? Then you are not the only one, because there is a major malfunction that has affected many Chromecasts. We already know this.
Interference at Chromecasts
Do you try to stream a series or film to your Google Chromecast, but are you unable to connect to the device? Then your Chromecast is probably hit by a major malfunction. Users have problems with an older model of the Chromecast worldwide. This is the second generation Chromecast, which was released in 2015. The Chromecast Audio from 2015 also no longer works properly.
Do you have one of these Chromecasts? When connecting you will receive an error message in that case, making it no longer possible to stream your series, film or music to the device. The second generation of the Chromecast and the Chromecast Audio can no longer be verified due to the malfunction. It is now clear that causes the error message, because these models of the Chromecast have an expired certificate.

Google is working on solution
A user on Reddit has discovered the expired certificate and shared in one message. The second generation Chromecast and the Chromecast Audio both had a certificate that was valid for ten years. It will be ten years since the devices were released in 2025, so that the certificate went automatically. This now causes a malfunction at the Chromecasts, which means that streaming is no longer possible.
Google responded and indicated to be aware of the problem on the Reddit message. The company confirms that it is a malfunction with the second generation of the Chromecast and with the Chromecast Audio. At the moment, Google is working on a solution, but it is not yet clear when the problem will be resolved. The company will probably be publishing an update for the Chromecasts soon to resolve the malfunction.

Chromecast not resetting
In the reaction, Google emphasizes that it is not necessary to reset your Chromecast. Do you have one of the Chromecasts affected by the malfunction? Do not put the device back to the factory settings. Google is working on an update, which extends the certificate for the second generation Chromecast and the Chromecast Audio. So you don’t have to do anything at the Chromecast yourself.
For older models of the Chromecast, it is not possible to install updates manually. New software versions are automatically downloaded as soon as they are available. So just patience, because Google is working on a solution for the malfunction in the older Chromecasts. As far as we know, no other models have been hit by the malfunction, the third generation of the Chromecast and the Chromecast with Google TV have no problems.