"Could not find a required file" on `yarn start`

In my case command npm audit fix --force change version of react-scripts in package.json As I created app with --template typescript, older version of react-scripts could not find index.js, but I have index.tsx

I solve this by removing package-lock.json, node-modules folder and remove react-scripts from package.json, then npm i react-scripts

In my case I opened my wrong folder in vs code and was trying to run npm start from their and npm did not find the index.html in that path, so I looked the correct path and reopened the folder and got no issue. Hope this will help some new beginner.