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!

------------------------------

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.

------------------------------

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.

------------------------------

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.

------------------------------

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.

------------------------------

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.

[Miguitas]

Mismo problema!

[Harpy]

Are we talking hours, days or weeks for a fix?

Should I be shopping for an alternative?

[ChiloMaco]

Estimated time to have issue fixed? 

[CrookedBadge]

Same problem as in this one: https://www.googlenestcommunity.com/t5/Streaming/We-couldn-t-authenticate/m-p/437872
but since the comments are disabled and the issue hasn't been resolved (the current accepted answer does not cover my, and I'm sure many others` situation) I felt I needed to create a new topic.

Suddenly I could not stream to my chromecast from any up or from any device directly. Did a factory reset and now I can't set-up my Chromecast. Each time I try I get the error message "We couldn't authenticate your Chromecast".

The accepted solutions talk about updating the firmware through the UI, or with a help of a remote. I cannot upgrade through UI since I cannot complete the set-up and my Chromecast came without a remote 2nd gen model NC2-6A5. How do I push the new firmware to it?

[paco1]

same here

[Pao14]

Me pasa justamente lo mismo , ha sido de repente .. que hacer?

[Anonymous]

Yo también tengo el mismo problema

[Stef69]

Même problème pour moi. Comment faire ?

[Sgt_WauWau]

I have the same problem since yesterday

[paco1]

So far, nothing. I've already tried everything (from resetting to factory settings, uninstalling Google Home, trying to connect directly...) we have to wait for Google to come up with a solution.
I think this forum is where you'll be kept up to date if something moves....

[paco1]

de momento nada yo ya lo he intentado todo (desde establecer lo valores de fábrica, desinstalar google home, intentar conectarse directamente....) hay que esperar que google de una solución
creo que este forum es donde vas a estar al tanto de si algo se mueve....

[Anonymous]

Yo he hecho lo mismo y tampoco lo puedo solucionar. Desde ayer tamién

[Daniellexx]

Just had the same issue. Couldn't cast to anything so did a factory reset. Got to the stage of connecting my device and said couldn't authenticate. Thought it was just my device till I've seen chromecast has been down since 6pm last night. Ridiculous it's still ongoing 

[bjgraham]

I have the same problem. I have 3 Chromecast Audio devices and Google Home cannot connect to any of them. They all worked fine on Saturday night (March 8, 2025) but will not connect beginning March 9, 2025. They are all on the same WIFI network . I confirmed that each device is connected to my WIFI through my WIFI administration page. I tried to factory reset one of them but now Google Home responds "couldn't authenticate". 

How can this be resolved/fixed?

[bjgraham]

Found this on a Reddit link:

https://www.reddit.com/r/googlehome/comments/1j7crcn/chromecast_not_working/

From:

GoogleNestCommunity

Heyall,

We're aware of an emerging issue impacting Chromecast 2nd gen and Chromecast Audio devices and 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.

[Jfcg]

Factory reset means im ducked?

[MPD0353]

2 days and I'm pretty much all run out of patience! Google at the very least could give updates every 12 hours or so. I want to know what my next move is. Bad business. 

[philipjhudson]

same here

[Carmenste]

Same here 😔

[BadFlash]

The issue is your CC SSL authentication certificate that has an intermediary CA cert that expired... you can add it back by setting your phone date/time to March 7th 2025 ... you won't be able to do anything else after that though.

[Luciano-Lux]

Stesso problema, da ieri 09/03/2025, da due differenti tel. android e da PC. Eseguito reset di tutto. tel., PC, Chromecast, modem, sempre con lo stesso risultato. 

Sulla televisione appare la schermata di Chromecast con la scritta di scaricare l'app Google Home (eliminata e scaricata nuovamente), da tel, ho provato più volte un collegamento creando nuovo percorso, quando chiesto di verificare la presenza di dispositivo Chromecast veniva trovato (ogni volta con un numero differente).

Tentato collegamento, apparsi sullo schermo lettere e numeri da digitare, ma poi non ho avuto la possibilità di inserirli perché è apparsa la scritta di errore nel collegamento: "non è stato possibile collegare il dispositivo".

Cosa fare?

[Mike_77]

Same here "We could not authenticate your Chromecast Audio". Tried rebooting everything, internet, wifi, Chromecast, Pixel, any feedback from Google?

[CarolD10]

And me! This obviously is a current issue with a flock of people having this problem today. 

[jimmeka]

Same here 😢

[paco1]

this sounds like one of the dirtiest workarounds ever heard🤣

[BadFlash]

There's even more dirty nasty sh*t you can do to get casting to work if you have an android phone and/or are using chrome browser.

[Nclong1022]

Help! Having the same problem and I can't figure out how to fix it. I've factory reset my chromecast and I get that message. When I try again, it goes through to connect but then it says it can't communicate with my chromecast. Was working fine up until yesterday! 

[BadFlash]

The issue is your CC SSL authentication certificate that has an intermediary CA cert that expired... you can add it back by setting your phone date/time to March 7th 2025 ... you won't be able to do anything else after that though.

[Nclong1022]

You're right. I changed the date and was able to get it set up I guess but the device isn't showing up on my Google Home and I still can't cast anything to my TV. This is frustrating. 

[Zimzom]

Oki so inte not worth trying that then. Or have u been able to cast anyting since u wrote this. Cuz then I'm changing date as well

[paco1]

Confirmed. I took an old andoird changed the date and I was able to configure chromecast

so now I am where I was last night😡

At least it should autoupdate (if is there any update to be made🙄)

[CrookedBadge]

Shouldn't the solution then be renewing the certificate? Surely that would be a better solution than changing the date?

[AndreHelio]

Mesmo problema aqui.

[ClaraØ]

I have the same issue. Although I get the message in danish, and it says it cant connect - but I have tried everything. Maybe it doesn't differentiate between the two messages in danish, so I’ll tag along here. 

[Miguelo]

09 marzo 2025. Chromecast dejò de funcionar. Seguì todos los paso y nada me dice que no reconoce Chromecast.

error message "We couldn't authenticate your Chromecast".

[Bruised]

same 

[Kirait]

Stessa cosa anche per me. Fatto tutto anche io

[Pao14]

He leido todos los comentarios de la comunidad a mi desde ayer por la noche ya no pude conectarme para nada hice de todo lo mismo que habeis hecho vosotros para poder conectar mi Chromecast y no hay manera... me volvi loca queriendo hacer de todo..🤣 pero ahora veo que estamos en las manos de Google tendra que ver la manera de como resolverlo. o no tengo idea de que pasara... si alguien logra solucionarlo comentarlo 🙏

[lukaszgrzebyta]

Tam sam problem od wczoraj wieczora 🙄

[newnikka0412]

Had the same problem since last night until now 😮‍💨