Settings & keep-time · Services and self-healing
Why does the Background service row say "Not responding"?
Short answer: The background service is installed but hasn't reported in recently. Click Restart now on the row; the self-healing monitor will also try to fix it automatically on its next check.
It means the background service is installed but hasn't reported in for a few minutes — usually because it got stuck. Click Restart now on the row to repair it.
You don't always need to: the self-healing monitor also tries to fix this automatically on its next check. If the row keeps returning to Not responding, restart your Mac and contact support from the app.