(FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)

try it:

brew install watchman

It worked to me.

I ran into the same issue and this is what it worked for me:

• 1) delete package-lock.json
• 2) npm cache clean --force
• 3) wait 1 min.
• 4) npm-install, this will create our new package-lock.json ( npm notice created a lockfile as package-lock.json )

Found out my global packages were corrupted

  "react-dom": "^16.0.0",
  <<<<<<< HEAD
  "react-router-dom": "^4.3.1",
  =======
  "react-router-dom": "^4.1.2",
  >>>>>>> 83340ffacc1ea542b788d66484413578afd4ef4c
  "react-scripts": "^1.1.4"

I had this issue because of a wrong version of node installed.