After expo eject I run npx @react-native-community/cli doctor It shows ✖ Watchman - Used for watching changes in the filesystem when in development mode
I'm had the same issue after running 'react-native doctor'.
✖ Watchman - Used for watching changes in the filesystem when in development mode
- Version found: 2021.10.04.00
- Version supported: 4.x
I entered 'e' to fix the error and it worked!
› Press e to try to fix errors.
This was an issue with doctor - as you say, the date format (CalVer) versions are all newer than 4.9, which was released in 2017.
The misleading error was fixed in https://github.com/react-native-community/cli/pull/1700 (which should be included in new installations of RN ^0.70.1) - it can be safely ignored.