How to validate and use this app?

[matthew-carroll]

Hi, I've tried following the README instructions as best I can to use this app, but I seem to be unable to either validate my pull.yml, nor generate and merge an update PR.

The repo where I'm trying to run this app is here: https://github.com/Flutter-Foundation/flutter/tree/upstream_sync

The upstream repo I'm trying to sync with is here: https://github.com/flutter/flutter

Following the README instructions, I created a new default branch. In my case I called it upstream_sync. There, I added the following pull.yml: https://github.com/Flutter-Foundation/flutter/blob/upstream_sync/.github/pull.yml

I tried validating my configuration with: https://pull-validation-uxx737qt0sl1.runkit.sh/?url=https://raw.githubusercontent.com/Flutter-Foundation/flutter/refs/heads/upstream_sync/.github/pull.yml

The result is:

{
  "error": "initialization_error",
  "message": "There was an error initalizing your endpoint."
}

Given I couldn't seem to validate the configuration, I then tried to run the app to see what happens. Based on README instructions, I navigated to: https://pull.git.ci/process/Flutter-Foundation/flutter

At that address, the page simply reads "Success". However, no PR was created in my repo, and no PR was merged.

At this point I'm unsure what else to try.

Additionally, assuming that I'm able to get the app to create and merge update PRs, how can I setup the app to do this once per day?