: Many GHCR images require a Personal Access Token (PAT) for access. Authenticate using the following command: echo $YOUR_PAT | docker login ghcr.io -u YOUR_GITHUB_USERNAME --password-stdin .
The error message typically occurs when a tool like Docker, Homebrew, or a CI/CD runner cannot retrieve a package from the GitHub Container Registry (GHCR). This failure is rarely due to GitHub being down; it usually stems from authentication issues , network restrictions , or expired local credentials . 1. Authentication and Permission Errors download failed https //ghcr.io
: Ensure your token has the read:packages scope enabled. For pushing images, you also need write:packages . : Many GHCR images require a Personal Access
: If you previously logged in but your token expired, Docker may still attempt to use the old, invalid credentials. Running docker logout ghcr.io and then logging back in often resolves "denied" or "unauthorized" errors. 2. Network and Firewall Blocks This failure is rarely due to GitHub being
If you are trying to download a private container or a package with restricted access, the registry will reject the request if you aren't properly logged in.
Corporate and home networks often block specific domains or use security software that interferes with HTTPS requests to GitHub's infrastructure.