There was a short-lived issue with our app repository causing an error when trying to update sandboxed Google Play from our App Store. You can ignore it and let it update automatically or manually refresh and update it now. We’ll implement checks to avoid it happening again.
We were trying to remove all of the obsolete versions of Play services from our repository and accidentally removed more of them than intended. This was caused by us not having as much automation as we should for managing removing old versions from the repository. We’ll fix that.
This was fixed a couple minutes after the problem was communicated. It only lasted for an hour because Element Web had an update with a bug breaking alerts for replies/mentions. Several people did quickly report it but it didn’t get successfully passed along for over an hour.