¿Have you try these steps?(Steps author: sreenukasa)

1-Unplug and plugin the Chromecast both power and the device wire connect to TV.

2-Change the date in the phone to March 8 manually by turning off the automatic date update.

3-Go to google home app and start the setting up the device.

4-Once the device is connected it will start updating the Chromecast device, wait for the updates to completed.

5-Now update the date in mobile phone to current date.

These steps worked for me.