Hi all, As usual, I cloned the main repo and executed `npm install`/`npm start`. But unfortunately app crashed very soon reporting the error in the subject. From this thread https://github.com/typescript-eslint/typescript-eslint/issues/863 I fixed my local setup replacing into package.json react scripts lib: `"react-scripts": "^3.1.2",`. I hope it helps. Thanks for your work.