GitHub Actions "Skipping this check because the workflow file is invalid on this ref"

GitHub evaluates the workflow file as it exists on a specific ref. If that file is invalid on the ref backing a required check, the check is skipped rather than run - leaving merge blocked with no failing job.

What this error means

A required check never runs and merge is blocked; the run page notes the workflow is invalid on the ref.

Skipping this check because the workflow file is invalid on this ref.
The workflow file has a syntax or schema error on the branch backing this check.

Common causes

Invalid workflow on the base or head ref

A YAML/schema error on the ref GitHub evaluates means the workflow cannot be compiled, so the check is skipped.

Required check name no longer produced

A renamed or invalid job means the required check name is never reported.

How to fix it

Fix the workflow on the relevant ref

1. Open the workflow on the ref noted in the message and fix the YAML/schema error.
2. Confirm the job that produces the required check name still exists.
3. Push so the check can run.

How to prevent it

• Lint workflow files in CI on every change.
• Keep required-check names in sync with the jobs that emit them.

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