"The user limit on the total number of inotify watches was reached"

This error reach a system limit on the number of files you can monitor.
See your current system limit.

cat /proc/sys/fs/inotify/max_user_watches

You can temporarily change limit with next command.

sudo sysctl fs.inotify.max_user_watches=524288
sudo sysctl -p

Also you can permanently change limit with next command.

echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf
sudo sysctl -p

ref. https://github.com/guard/listen/wiki/Increasing-the-amount-of-inotify-watchers