We’ve separated reports into two main issues:
The first issue manifests as the “Oh no!” error. This is a generic error message that can mean many things, but we’re seeing a bunch of them show up in our logs, all with the same underlying error message, that correlates with the reports sent in by various people on this thread (thank you to everyone who emailed us with a report, it’s extremely helpful).
That stopped happening 3 hours ago. It looks like it was from 17:45 ET on the 24th to 9:00 ET on the 25th, and only affected apps on the scheduled cluster; the end time correlates with the schedule cluster being updated. Our working hypothesis is that something went wrong building one of our servers, and the issue went away when the bad server was replaced. It doesn’t seem tied to any code we recently deployed, but we’re continuing to investigate.
So the short version on this issue is that we’re probably good for now, but we’re still investigating what happened to make sure it doesn’t happen again.
The second issue is a bunch of new, unexpected issues showing up in the issue checker. We haven’t made as much headway on this; when we visited some of the apps that were reporting this issue, we weren’t able to see it. It might have also resolved? If you had previously been experiencing this and it’s fine now, please let me know; if you’d previously experienced it and it’s not fine yet, please let me know that too