GitHub authentication fails after upgrading Argo CD from v2.10 to v2.11 using GitHub App

[vamsee33]

Describe the bug

After upgrading Argo CD from v2.10 to v2.11, GitHub authentication using a GitHub App stopped working. In v2.10, everything works as expected using a GitHub private app key. However, in v2.11, I’m seeing an authentication error when Argo CD tries to fetch from the repository.

Error message:

fatal: could not read Username for 'https://github.com': terminal prompts disabled

⚠️ Note: The error mentions gitlab.com even though we are using GitHub, which might indicate a configuration or parsing issue.

To Reproduce

Set up Argo CD v2.10 with GitHub App authentication — works correctly.

Upgrade Argo CD to v2.11 (no changes in credentials or repository config).

Sync or fetch a repo – authentication fails with the above error.

Expected behavior

Authentication with GitHub App should continue to work after upgrade, just as in v2.10.

Version

Argo CD: Upgraded from v2.10.x to v2.11.x

Git host: GitHub

Auth method: GitHub App (private key)

Additional context

GitHub App is configured correctly.

SSH is not used.

Repo URL uses HTTPS and worked prior to the upgrade.

Please advise if any breaking changes to GitHub App support were introduced in v2.11 or if any configuration changes are required post-upgrade.