Error when evaluating 'runs-on' for job 'prettier'. .github/workflows/ci.yml (Line: 209, Col: 14): Unexpected value ''

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/cache@v3. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

in order to compile .yrl files, you must add "compilers: [:yecc] ++ Mix.compilers()" to the "def project" section of erlex's mix.exs