It is not uncommon for devices to stop working as they should. In many of these situations, a simple reboot will solve the problem. If you have a Google TV streaming device, you can restart it. See how to do the process.
The process of restarting a Google TV device, such as Chromecast, is similar to Android TV devices. This does not guarantee that it will resolved all your problems are guaranteed on resolution all of problems but it's a good first step. With a few simple steps, you will restart it device.
Now select "Settings" from the popup menu.
You are now in the full Settings menu. Go to "System".
Then scroll to the bottom of the system settings and select "Restart".
Finally, you will be asked to confirm that you want to restart device now. Select the "Restart" button to proceed.
Source of information: howtogeek.com