Google confirmed it has an issue with the login feature to the Google Ads console. Google said on Twitter "At ~8am PDT we experienced an outage for <1 hr on the login page for Google Ads, Search Ads 360, and Display & Video 360."
Google wanted to let advertisers know that this login issue had no impact on reporting or ad serving. It was just an issue with letting advertisers login to see and manage their accounts. Google said "Ads continued to serve and reporting captured metrics during this time."
Here is the tweet:
At ~8am PDT we experienced an outage for <1 hr on the login page for Google Ads, Search Ads 360, and Display & Video 360. Ads continued to serve and reporting captured metrics during this time. We identified and fixed the issue ASAP. Everything is working as expected now.
— Google Ads (@GoogleAds) October 29, 2019
Forum discussion at Twitter.