Unable to find any artifacts for the associated workflow

Error when evaluating 'strategy' for job 'clean'. .github/workflows/snapshot-automation.yml (Line: 218, Col: 18): Error parsing fromJson,.github/workflows/snapshot-automation.yml (Line: 218, Col: 18): Error reading JToken from JsonReader. Path '', line 0, position 0.,.github/workflows/snapshot-automation.yml (Line: 218, Col: 18): Unexpected value ''