Are you getting these after a restart or is it constant once it starts? If you’re not rebooting are you sure ha isn’t acting up. Perhaps another addon that has an integration where you would see interrupts in history.
Sometimes the install just gets corrupted and a remove and reinstall can correct it. It’s a fairly quick process.
Backup flows and NR. Stop NR, remove NR. Go to
/config rename NR folder to
node-red.old. Reboot the system → settings, hardware, pi, three dots top right, reboot host. Or however you reboot your hardware at an os level. Then reinstall.