https://www.vice.com/en_us/article/y3pn9w/antivirus-used-by-millions-blocked-all-google-sites-by-mistake-sowing-chaos

A popular antivirus that’s used by millions of people around the world blocked all Google sites and services on Wednesday due to a mistake. 

For around an hour on Wednesday morning, some people who had Malwarebytes antivirus installed on their computers could not visit any Google site or use services like Gmail or the Google Play Store, according to people who complained about the issue on Twitter.