Yes, this is the longest downtime I&#x27;ve had on App Engine for years. I&#x27;ve been up all night and the app engine team were up working on it as well and sending updates.<p>It seems that the default authentication method broke for some apps. They have different APIs to reach your data, and I tried another approach and it worked, but it&#x27;s different enough, and we use Cloud Storage in too many places, that it would take a day or more to change our code to use it. I started on it anyway, in case the outage lasts longer.