'We couldn't authenticate your Chromecast"

[RLB70514]

Within last couple days, unable to cast (Netflix). After factory reset the Chromecast, seems all is good. Device found and select to connect. But, keep getting "... couldn't authenticate your Chromecast"

[Natstanley1]

Yes we are having the same problem.  Did you find a resolution? 

[Kenncon]

Same here. Sudden loss of chromecast. After factory reset, not able to authenticate chromecast. Total b.s.

[RLB70514]

Hi, unfortunately I have not. Have resorted to HDMI cable from laptop to TV if I want to watch anything on big screen. Wonder if it's because I'm using 1st gen Chromecast .. 

[Lili3]

Bonjour

Ba j'ai le même soucis... Est ce que quelqu'un a trouver une solution peut être ?? 

[Gavinth]

Same here. Chrome cast connected but unable to authenticate 

[F-3000]

Same here. At sunday Netflix gave an error after trying to connect to Chromecast. Yesterday (monday) I noticed that nothing could connect to Chromecast. Did a reset, now can't get it to work with Google Home due to authentication failure. Tested at friend's place with her wifi to make sure it's not my home network that's at fault, but no good, same error. My guess is that Google pushed an update that broke Chromecast for some people. Question is, how to get it fixed, as in current state my Chromecast cannot access internet for updates.

Chromecast 2

Edit: In case someone's actually reading these I'm doing an edit. Reason wasn't Google breaking Chromecast with update. Things broke because they didn't update - a certificate inside Chromecast expired.

[Lovorka]

I am reading this. So, what happens now? Will they fix it? 

[Nunyabisnes]

Me too, not sure why?

[Dangio]

Anche a me da ieri da il seguente errore: "Impossibile autenticare il dispositivo Chromecast. Visita il sito support.google.com/chromecast per ricevere assistenza per la risoluzione del problema. Ok"

Ho provato a resettare la Chromecast, riavviare il cellulare, il router, reinstallare app Google home e il problema rimane sempre. Google fatti viva a darci spiegazioni! Grazie 

[Dangio]

Vi riporto la risposta ufficiale che ho ricevuto da Google:

Grazie per aver contattato il team dell'Assistenza clienti di Google Nest.

Ci dispiace sinceramente per l’inconveniente. I nostri tecnici sono già a conoscenza della situazione e stanno lavorando per risolverla nel più breve tempo possibile. Solitamente questo tipo di situazioni viene risolto con un aggiornamento, ti chiediamo quindi, gentilmente, per il momento, di avere un po’ di pazienza.

Ti ringraziamo di cuore per la comprensione e la collaborazione. La tua fiducia è molto importante per noi e la apprezziamo profondamente.

[Timh-g]

Mine stopped working as well. TV recognised it Google home app finds it but won't finish installation do to it can't authentication

[guillaume14]

La même chose pour moi également , quelqu'un aurait la solution ?

[Bivnut]

Chromecast said not to reset to factory settings, if already done so we have to wait until they’ll fixed the issue and then they will advice us what to do 👍

[Dugirl704]

Thanks for the update. 

[LaG62]

How will they advise, our nbn was out for days so yes I did a factory reset

[suz4]

Been having the same problem for 24 hours. Can't authenticate. Going nuts

[Dorabella]

I'm in the same boat. I changed my WiFi and had problem with both chromecasts, but managed to get the bedroom one working fine, tried livingroom again and no good. This was Sunday. Finally thought I'd try a factory reset after waiting for support to phone me back on Sunday and this morning, still waiting, and apparently chat doesn't exist on the link in the app?

Now seeing I shouldn't have done the reset, going by what someone above has said, so that's grand 😏

[vgamoranto]

Same problem with my 2nd gen even after the reset. 

[Calixto2]

Having same issue. Tried to reboot the device. Re set up chrome cast stil the same with we cant aunthenticate your chromecast. Using gen 2 device... please advise for resolution. Thanka

[itashokraj]

I am facing Same issue. After factory reset, not able to authenticate Chromecast. Getting error message 'We couldn't authenticate your Chromecast"

[DChavez]

I had the same issue but if you reset you phone/ipad date to before 9 March, you should be able to set-up chromecast.. but that being said, it is still not connecting to netflix for me

[Milo20]

Doing this did work for me to add it back into the home app. But like you I am still unable to cast to it. 

[manikspn2025]

How to reset to a date ? , I am also facing same issue

[Milo20]

You open up your phone or tablet's settings and change the date of the device to one in the past. I changed mine to the 7th of march set it up then changed it back to current date. 

[manikspn2025]

I changed date and setup ,Chromecast setup done , but unable to stream from apps it says outdated firmware detected. So not able to use it , so waiting for the bug to fix 😔

[rraxsa]

Thank you!!! It works!

[suz4]

Just went into my phone settings Chromecast is not in devices 

[F-3000]

Thanks for the info. At least can make Chromecast able to connect net and load update on its own once update is published.

Edit: Nope. Yes, able to setup Chromecast, but it doesn't connect to wifi.

[manikspn2025]

I am also facing same issue but no response from Google so far. Raised a ticket but no use

[Yassinelshabraw]

Same issue with me since Monday

It's seems a new software update bug.

Hopefully it is reversible action 

[Ni3Kailash]

Facing same issue and been stucked with Chromecast 

[Bangore]

Mine stopped yesterday and still no help 

[realbriguy]

same issue here since March 10, 2025

[Owen4all]

Same issue. Before I read this, I factory reset. Now what? How will we know when bug is fixed?

[aarohi11]

Same here ..since past 48 hours not able to authenticate my Chromecast..it says Chromecast is connected but not authenticate.

[manikspn2025]

No response from Google for the ticket till now. Almost 2 days . Just says In progress . But no reply .no positive sign till now.may be they stopped the Chromecast usage not sure 

[Cas20000x]

Agh. Just did a reset, looked up the authentication error, now I'm here. Can't connect, so it won't be able to receive any update, probably bricked I guess.

[F-3000]

Not bricked, if Google does some fix around with Google Home.

[Chantalfeeney]

I'm having the same issue has anyone heard any updates