Example does not work

[derwaldgeist]

If I go to the examples folder, install via npm i and start with npm start, I only get an error message:

Error: Cannot find module 'object-assign'
Require stack:
- /Users/tom/dev/marble/tests/react-really-simple-infinite-scroll/node_modules/react/cjs/react.development.js
- /Users/tom/dev/marble/tests/react-really-simple-infinite-scroll/node_modules/react/index.js
- /Users/tom/dev/marble/tests/react-really-simple-infinite-scroll/example/node_modules/react-scripts/scripts/start.js
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:966:15)
    at Function.Module._load (internal/modules/cjs/loader.js:842:27)
    at Module.require (internal/modules/cjs/loader.js:1026:19)
    at require (internal/modules/cjs/helpers.js:72:18)
    at /Users/tom/dev/marble/tests/react-really-simple-infinite-scroll/node_modules/react/cjs/react.development.js:18:15
    at Object.<anonymous> (/Users/tom/dev/marble/tests/react-really-simple-infinite-scroll/node_modules/react/cjs/react.development.js:1911:5)
    at Module._compile (internal/modules/cjs/loader.js:1138:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1158:10)
    at Module.load (internal/modules/cjs/loader.js:986:32)
    at Function.Module._load (internal/modules/cjs/loader.js:879:14) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [
    '/Users/tom/dev/marble/tests/react-really-simple-infinite-scroll/node_modules/react/cjs/react.development.js',
    '/Users/tom/dev/marble/tests/react-really-simple-infinite-scroll/node_modules/react/index.js',
    '/Users/tom/dev/marble/tests/react-really-simple-infinite-scroll/example/node_modules/react-scripts/scripts/start.js'
  ]
}