Ring Video Doorbell (1st Gen) Motion detector not working

Hello. I ask you to help. I ran into a problem. Ring Video Doorbell (1st Gen) does not have a motion detector. This is my second doorbell. The pen device has no such problems.Alerts do not work when motion is detected. The event log does not fill out and alerts do not come on the smartphone. The motion detector is activated. Motion detection zones are indicated. The sensitivity of the motion detection sensor is indicated. All settings are completed. But motion detection does not work. What should I do?