"unhandledRejection" error

Feedback source

None

GitHub Copilot plugin version

0.16.0.202604201810_nightly

Eclipse IDE and version

4.40 latest nightly I20260421-1800

Platform

Just some code browsing in java code, switching from one editor to other, noticed this error reported int he error log.

null
org.eclipse.lsp4e
Error
Wed Apr 22 15:12:23 CEST 2026
[LS:GitHub Copilot Language Server][Error]	[default] unhandledRejection: Error: Tests: either GITHUB_PAT, GITHUB_OAUTH_TOKEN, or GITHUB_OAUTH_TOKEN+VSCODE_COPILOT_CHAT_TOKEN must be set unless running from an IS_SCENARIO_AUTOMATION environment. Run "npm run get_token" to get credentials.
    at Flt.tokenProvider (/snapshot/copilot-intellij/dist/main.js:1440:8372)
    at Object.get accessToken [as accessToken] (/snapshot/copilot-intellij/dist/main.js:1311:3830)
    at Flt._handleAuthChangeEvent (/snapshot/copilot-intellij/dist/main.js:780:10408)
    at processTicksAndRejections (node:internal/process/task_queues:105:5)

Steps to reproduce

No steps

Logs (optional)

No response

Expected behavior

No errors

Actual behavior

Error logged sometimes

Additional information

No response

Start with the authentication flow around tokenProvider, accessToken, and _handleAuthChangeEvent shown in the error, noting that the report comes through org.eclipse.lsp4e during Eclipse code browsing. Reproduce the intermittent error if possible and compare it with the npm run get_token credential requirement. Done means the same situation no longer produces an unexpected error log.