The workflow is not valid. .github/workflows/ci.yml (Line: 14, Col: 3): The identifier 'mpich-4.2' is invalid. IDs may only contain alphanumeric characters, '_', and '-'. IDs must start with a letter or '_' and and must be less than 100 characters. .github/workflows/ci.yml (Line: 20, Col: 3): The identifier 'mpich-4.1' is invalid. IDs may only contain alphanumeric characters, '_', and '-'. IDs must start with a letter or '_' and and must be less than 100 characters.