I’m dealing with a slow/unresponsive app and considered changing the size of the app to test if it’s struggling with resources (I doubt it). At https://fly.io/apps/<app>/scale I clicked Size → dedicated-cpu-1x and received the error message above, which I don’t understand at all.
Looks like a bug in the UI. Until we get that fixed you can try scaling with flyctl: Scaling and Autoscaling · Fly Docs
At least I’m not crazy. I think I narrowed the problem down to something going on with Postgres anyway. Load time on any page reading from the database is great, but any time I have to write the request times out and nothing ever gets committed.