docs/checks/internet.md
Make sure the runner has access to https://api.github.com
The runner needs to access https://api.github.com to download any actions from the marketplace.
Even the runner is configured to GitHub Enterprise Server, the runner can still download actions from GitHub.com with GitHub Connect
X-GitHub-Request-IdPlease check the network doc
Contact GitHub customer service or log an issue at https://github.com/actions/runner if you think it's a runner issue.