reached max capability of ai analysis

Hello I have bougt a dahua camera set. Why dahua? Because the alarm function. My set: # Dahua DHI-NVR4416-16P-4KS2/I 3x # IPC-HDW3849H-AS-PV / HDW3849HP-AS-PV S3 8 MP # Dahua VTO2311R-WP (For now only 3 cameras) The biggest problem is, i cant setup the face recognition. I become this failure...