The meaning of this error is that the number of files monitored by the system has reached the limit!!
Result: The command executed failed! Or throw a warning (such as executing a react-native start VSCode)
Solution:
Modify the number of system monitoring files
Ubuntu
sudo gedit /etc/sysctl.conf
Add a line at the bottom
fs.inotify.max_user_watches=524288
Then save and exit!
sudo sysctl -p
to check it
Then it is solved!