Hi @beann, it could be related the system user reaching the total number of inotify watches. Here are a few reports that seem to be related to what you are reporting:

Watchman GitHub issue:  The user limit on the total number of inotify watches was reached · Issue #163 · facebook/watchman · GitHub


(more links in follow-up post, can only post two links at a time)
More details on inotify on macOS and Linux: Everything about inotify in Linux and MacOS
Here is an example command how to increase the inotify number (you might need to change it depending on your OS):
echo 999999 | sudo tee -a /proc/sys/fs/inotify/max_user_watches && echo 999999 | sudo tee -a /proc/sys/fs/inotify/max_queued_events && echo 999999 | sudo tee -a /proc/sys/fs/inotify/max_user_instances && watchman shutdown-server && sudo sysctl -p