no bundle URL present in react-native?

Assuming that you are using nvm and multiple versions of node installed, here is the solution:

1. Say that you run npm install -g react-native-cli in v6.9.5.
2. Now make v6.9.5 as default by running nvm alias default 6.9.5
3. Now run react-native run-ios

The problem is, you have multiple versions of node installed via nmp and to install react-native-cli you have switched or installed latest version of node, which is not marked as default node to point in nvm yet. When you run react-native run-ios this opens up another new terminal window in which default nvm is not pointed to the node version where you have installed react-native-cli. Just follow the above setup, I hope that should help.

Answered the same here: https://stackoverflow.com/a/45267703/1292050

Others:https://github.com/facebook/react-native/issues/12754