Can't connect

[jkinley]

never had this happen before. know what the issue is?

[yhay81]

That screen is Next.js's production fallback, so it unfortunately hides the real exception; it does not by itself mean the GitHub connection failed. The quickest split is: can Pages CMS still open a different repository?

• If another repository opens, authentication/app permissions are fine. The failing repository's config or content is throwing during the server render.
• If every repository fails, then re-authorize the Pages CMS GitHub App and confirm that the app still has access to the selected repositories.

For the one-repository case, malformed YAML/front matter is the leading suspect. The same exact screen was reported in issue #378; the maintainer found invalid multiline YAML, and noted that Pages CMS 2.0's parsing had become stricter. Current Pages CMS parses collection content through YAML.parse, so one bad file in a configured collection can prevent the collection page from rendering.

In particular, this is invalid YAML:

description: first line
  second line

Use a block scalar instead:

description: >-
  first line
  second line

I would check the last commit made before this started, then validate:

1. the Pages CMS configuration file;
2. every Markdown/YAML file matched by each collection path;
3. multiline fields, indentation, tabs, missing closing quotes/brackets, duplicate delimiters, and values containing YAML-significant characters.

A fast way to isolate it is to temporarily restore the last known-good commit (or remove half of the newly added/edited entries), reload Pages CMS, and bisect the changed files. Reinstalling the app will not fix malformed repository content.

If other repos work and all YAML validates, add the repository URL, branch, the exact page/path that triggers it, the last known-good commit, and the error's digest value to this discussion. Those details are what the maintainer needs to find the corresponding server log; the screenshot alone intentionally omits the useful exception message.