React Native - Port 8081 already in use, packager is either not running or not running correctly Command /bin/sh failed with exit code 2

Question

I\'m trying to get up and running with React Native and I am seeing the message below in Xcode:

Port 8081 already in use, packager is either not running

Answer 1

I just had the same problem and found out Docker was using port 8081.

Therefore if you need to debug stuff with React Native, you need to stop docker, if it is using the same port.