This error message is caused by several factors and to fix this you will have to follow the troubleshooting steps listed below.
Before performing the recommended troubleshooting steps for this particular problem I suggest that you try restarting your computer first. This will refresh the operating system as well as remove corrupt temporary data and is quite effective in fixing most software related issues.
Clear the cache and data of your browser
One of the most common reasons this error message occurs is because of a corrupt cached data in your browser. If this is what’s causing the problem you will have to clear the cache and data of your browser.
Restart your modem or router
Another factor that can cause this issue is when your computer does not have any internet connectivity. Try to open another browser tab then visit any website. If you can’t open the website then you can try to reboot your modem or router to fix the problem. Just turn the device off and wait for a minute before turning it back on.
Check if the error issue still occurs.
You can also try to:
Flush the DNS Cache
Try using Google’s Public DNS
Reinstall your browser