Runtime is not ready for debugging
These solutions both work:
- On simulator:
Hardware -> Erase All Content and Settings - On device: Delete the app from the device and reinstalling it
(Update credit to @Form and @John)
Indeed this seems to be a weird error that does not want to go away. Never fixed it on my mac either.
I just use this : https://github.com/jhen0409/react-native-debugger Nowadays and it works like a charm.
I know it does not "fix" your problem, but its a really good alternative and it works like a charm.
If you are using WebStorm, make sure you use debug to start the application, not just run. That can also cause it.
Pressing CMD-D and then choosing Stop Remote JS Debugging resolved the issue for me