Example:

The configured user limit (128) on the number of inotify instances has been reached

This message means your system-wide limit for inotify instances (Linux file-watchers) is too low for what’s running (often IDEs, file indexers, dev servers, Docker, etc.). Fix it by raising the limits and/or stopping the process that’s consuming them.

sudo sysctl -w fs.inotify.max_user_instances=1024
sudo sysctl -w fs.inotify.max_user_watches=524288
sudo sysctl -w fs.inotify.max_queued_events=65536

Create a sysctl config file:

sudo tee /etc/sysctl.d/99-inotify.conf >/dev/null <<'EOF'
fs.inotify.max_user_instances=1024
fs.inotify.max_user_watches=524288
fs.inotify.max_queued_events=65536
EOF

Apply:

sudo sysctl --system