eufy robot cleaner to fix (Romsey Ward CB1)

We have an oldish eufy robot cleaner that doesn't work properly. When we last used it, it started, and after a short while stopped, beeping. I have tried to clean it several times to see if that is the problem but the issue persists. Probably there are people out there who could do better. If you are one of them, let me know and it's yours :)