GitHub App authorization button is disabled on hosted sign-in

[farinazero]

Description

I cannot complete GitHub sign-in on the hosted Pages CMS at https://app.pagescms.org.

The Pages CMS GitHub App is installed successfully on a personal GitHub account and is restricted to one selected private repository. However, the GitHub authorization page shows the correct account and the requested email permission, while the Authorize button is disabled. The page also reports: You can’t perform that action at this time.

Steps to reproduce

1. Sign out of Pages CMS.
2. Open https://app.pagescms.org.
3. Choose Sign in with GitHub.
4. Review the GitHub App authorization page.

Expected behavior

The Authorize button is enabled so the GitHub identity can be connected to the existing app installation.

Actual behavior

The Authorize button is disabled, so the callback cannot complete.

Checks already performed

• The GitHub account's primary email is verified.
• The Pages CMS GitHub App installation is active and scoped to the intended repository.
• The installation has the expected read/write repository permissions.
• Fresh sign-in attempts generate fresh OAuth state and PKCE values, but the button remains disabled.
• Removing the unnecessary scope query parameter from the GitHub App authorization URL does not change the result.
• Another GitHub App can be authorized successfully from the same account and browser session.
• Email sign-in to Pages CMS succeeds, but correctly behaves as a collaborator account: it shows no repositories and direct repository access is denied.
• GitHub Status reports all systems operational.

Environment: hosted Pages CMS, GitHub.com personal account, Chrome on macOS, August 23, 2026 (CEST).

Could you confirm whether the hosted Pages CMS GitHub App authorization is currently restricted or whether this account/application pairing needs to be reset?