There might be a problem with the project dependency tree. It is likely not a bug in Create React App, but something you need to fix locally. fix code example
Example: There might be a problem with the project dependency tree. It is likely not a bug in Create React App, but something you need to fix locally.
/* Answer to: "There might be a problem with the project dependency tree. It is likely not a bug in Create React App, but something you need to fix locally." */
/*
Go to your "package.json" file.
Replace
*/
"react-scripts": "<whatever-is-currently-here>",
/* with */
"react-scripts": "1.1.4",
/*
Then run npm install and after that npm start
*/