Regarding an issue with Chromecast 2nd gen and Chromecast Audio

[GoogleNestTeam]

Update 3/20/25

Hey folks, 

If you previously performed a factory reset, we’re happy to report that the Google Home app update will reach all users today.

Please make sure you’re on version 3.30.1.6 for Android and 3.30.106 for iOS to set up your Chromecast (2nd gen) and Chromecast Audio. Check out this help center article if you need help updating the Google Home app.

If you’re still experiencing problems during setup, please reach out to customer support for further assistance. 

Thanks again for your patience while we worked to resolve this issue!

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Update 3/17/25:

Hi folks,

Thank you for your patience as we worked to resolve the issue with Chromecast (2nd gen) and Chromecast Audio devices. As of today, this disruption has been fixed.

If you did not perform a factory reset, your device should now function normally. If it is still not functioning as intended check the firmware version of your device by following the instructions here. If your device is not on the corresponding firmware version, please try rebooting your device to start the update process.

For users who have performed a factory reset, you will need to update your Google Home app to the latest version (3.30.1.6 for Android and 3.30.106 for iOS) to set up your Chromecast (2nd gen) or Chromecast Audio device again. The app roll out has begun and may take a few days to roll out to everyone. We’ll post a confirmation once the roll out to all users is complete.

We sincerely apologize for this disruption and any inconvenience it may have caused, and we are committed to ensuring all users are back up and running as quickly as possible.

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Update 3/14/25:

Hi everyone,

Thank you again for your patience, we have some good news - the fix should reach all users today. If your device has received the update it should be on the following firmware versions:

Chromecast (2nd gen): Firmware version 1.56.467165

Chromecast Audio: Firmware version 1.56.467166

Check the firmware version of your device by following the instructions here. If your device is not on the corresponding firmware version, please try rebooting your device to start the update process.

Please note: If you performed a factory reset during the troubleshooting process, you may still be experiencing an issue where you cannot re-setup the device. The team is working diligently to resolve this, and we will provide next steps as soon as possible.

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Update 3/13/25:

Hey everyone, thank you for your patience while we work to resolve this issue. Here’s the latest:

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. Your device must be connected to receive the update.

If you performed a factory reset during initial troubleshooting, you may still be experiencing an issue where you cannot re-setup your device. We are working to resolve this as soon as possible. Please continue to check the Community page here for updates and next steps.

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Update 3/11/25: 

Hi all,

An update on the situation: the team has identified the cause of the issue impacting Chromecast (2nd gen) and Chromecast Audio devices.

Please do not factory reset your device. If you previously performed a factory reset during troubleshooting, you may also be experiencing an issue where you're unable to re-setup your device. The team has identified the cause for this as well and is currently working on a fix.

We’re working to resolve this as soon as possible, and will keep you updated when there is more to share.

We sincerely apologize for the inconvenience, and appreciate your patience in the meantime.

Thank you.

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Hello,

We're aware of an emerging issue impacting Chromecast 2nd gen and Chromecast Audio devices, and we are working on a fix.

Do not factory reset your device - we will keep you all updated when the fix rolls out. If you have already factory reset your device, we will provide instructions to set your device back up as soon as possible.

Thank you for your patience.

[TheMadMatt]

Desde MVD, UY. Lo mismo con ambos Chromecast en casa. 

[Jo_Michaelson]

Same error

Two gen2 devices in Costa Rica 

[VikAth]

Yes. I am getting the same pop up message on my chromecast just now in the Netherlands

[Richardokeeffe]

Hi I am having the same problem I've tried everything 🤔

[BuzBuz]

Dispositivo non attendibile. Impossibile verificare Chromecast. Ciò potrebbe essere causato da un firmware del dispositivo obsoleto.

Ho eseguito un ripristino delle impostazioni di fabbrica e ora ottengo:

Non siamo riusciti ad autenticare il tuo Chromecast. Visita support.google.com/chromecast per ricevere assistenza nella risoluzione di questo problema.

Dispositivo: Chromecast 2a generazione

Regione: Italia

[EGIII]

This appears to be a large scale issue with Chromecast devices no longer being authenticated by Google. Hopefully this is a daylight savings time sync or other quickly addressable issue. Other users are reporting similar problems on Reddit.

https://www.reddit.com/r/Chromecast/comments/1j7c352/chromecast_is_untrusted/

[BuzBuz]

Anche in Italia chromecast non funzione e non viene riconosciuto al momento dell'autenticazione

[Bmcgovern_cast]

Having the same problem. This is **bleep**ed google

[Denis1987]

Aqui tbm estamos na msm situação, não configura novamente. Brasil

[Jjos89]

Same here now. Only one is showing up. Our home one is no longer working despite multiple reboots/resets.

[matuca]

Desde Uruguay, el mismo problema. Alguna solución?

[CharlieMuggins]

I am having the same issue. I have tried a factory reset on the Chromecast device and now I am unable to complete the setup. Very annoying.

[JoTexas]

There is something oddly beautiful in the connection through lack of connectivity.      As frustrating as this is, we can see we are not alone, which is something we tend to forget as we encapsulate ourselves in our bubbles of entertainment. 

     Now, if we could maintain such connection when the distractions are returned to our immediate environments, that could benefit all of us.

[GoodLuckY]

Same issue

[Piskji]

Same issue "cannot authenticate Chromecast Audio" from Italy, model rux j42

[QueenX]

I was just watching it. Went to the store and came back now it's not working. Restarted and reset everything multiple times and still nothing. 

[MattQ]

Same.  I was literally using my Chromecast Audio this morning to stream Spotify.
I know they ended the product in 2019 and said they'd keep releasing updates until September 2025 but it looks like a TLS security certificate on the device finally expired and they didn't update it to a new one.  Unless Google is willing to update the certificate it's trash now... unless Google helps us transition it to the OpenSource community and maintain it ourselves. What a waste.

[Bcrozier73]

Our was working this morning and then stopped.  I have reset both our phones, factory reset the Chromecast and my wifi router as well. I even deleted my Chromecast and tried to set up the device again to geth the couldn't authenticate your device message. 

[DougMcfe]

Same problem here. I have two NC26A5 and both stoped to connect with my Iphone or Android. "outdated firmware". - from Brazil

[lianakay287]

Me too

[Tankus]

Same here, can't suddenly cast on chromecast audio.

[Tryby]

Sama dgn saya, from Indonesia 

[Derger2000]

Hallo zusammen, seit heute abend funktioniert mein chromecast nicht mehr heute morgen lief es noch einwandfrei. Trotz auf Werkseinstellung zurückgestellt kommt immer wieder dieselbe Meldung lässt sich nicht authentifizieren. Ich bitte um eine Erklärung und Abhilfe. Vielen vielen Dank im voraus. Beste Grüße

[Mardecel]

JA É NOTÓRIO QUE HOUVE UMA ATUALIZAÇÃO DE FIRMWARE E GEROU ESSE PROBLEMA NO DOMINGO , POIS NÃO TEMOS SUPORTE ( BR ) E TAMBÉM RELATADO NA FRANÇA , ESPANHA, PORTUGAL , ARGENTINA E VARIOS OUTROS PAISES ...

O FATO: ESTAMOS SEM CHROMECAST...

O QUE FAZER... 

AGUARDAR OS TÉCNICOS RESOLVER O ERRO ...

VAMOS AO X E TODAS AS REDES SOCIAIS EXPLICAR ISSO APARA TODOS OS OUTROS CLIENTES OU. USUÁRIOS 

[Munmun]

My iPad and iPhone apps suddenly stopped casting while watching a video. Chromcast is working displaying its public photos, temp and clock but non of the apps are casting. YouTube given me outdated device firmware error when it tries  to connect.

i switched off/on the iPad,  chromcast  and the router 

i tried customer service but their agent didn’t seem to have the expertise 

[luigiman]

same issue with my chromecast audio. was using it earlier today, then it showed as offline and i couldn't cast to it. I tried to reset it but now i can't connect, i get an error that 'We couldn't authenticate your chromecast'. the Home Mini that i have still works fine. i tied resetting, clearing cache and storage on the Home app, restarting, multiple times. I do notice that the options when adding a new device in Google Home app look different, only 2 options instead of 3. COuld be a Home app update that went wrong?

[roby19_61]

Same here in Spain.

[Anders_Sweden]

Same here in Sweden on three ChromeCasts at the same time...

[Chopin]

Andrea from Italy, the same here.

Chromecast second gen stopped working (wifi connection ok but no cast and missing access to my Google account).

I tried reset and now it won't activate anymore, authentication issue.

Google killed old devices on purpose, it seems. 

[Wingqvist]

Same problem. Restarted wifi and tried to reinstall my 4 chromecast units. Didn't resolve anything. 

[NizhoniNight]

Same issue

[dotonthehorizon]

Same here. Old circular puck Chromecast version.

[Gettone1]

Stesso problema. Se avessi letto prima il forum non avrei sprecato 30 minuti per fare prove di restart e reset. 

Attendiamo soluzione. 

[Anonymous]

El mismo problema no se puede autenticar tu chromecast...

Google HOLA? 

[Slaxman]

All of sudden unable cast and it's giving error like could not framework some thing like.

I tried to reset chrome cast but it's giving  we could not authenticate your chrome cast. Please suggest on this

[roby19_61]

Hello Google!  Congrats! You just killed millions of Chromecasts with a wrong certificate. Ask Gemini on how to undo.

[Gabriela-Flores]

Estan borrando los hilos de convercacion con este tema

[graciex]

I’m having the exact same issue, been trying to sort it for 35 minutes, nothing will work. it was working absolutely amazing up until today what has happened? 

[Edenilson]

Me párese un error que Dise, autenticador de chromecast 

[Hwin]

Chromecast worked fine 4 hrs ago.  Now I press the cast symbol, it goes to the options of where to cast and then nothing happens.