Google Nest Community

Thank you @JillG and Google. My ChromeCast is back to normal. 

Hi JillG, Thank you for escalating this issue.I am from New Jersey, USA.I tried factory reset and restarting my router. But getting the same authentication error on my Google Home app. I am using an old Chromecast model NC2-6A5. How do I find the fir...

Even I am getting this issue. It says could not authenticate.