Erstellen Sie die App mit einer bestimmten React -Version
// if changing the create-react-app script version does nothing then
npx create-react-app
//edit the package.json for react
{
"react": "^16.0.0",
"react-dom": "^16.0.0",
}
// run in terminal in the project folder
npm i
// and it will work
Pishach