Part 107 UAS pilot reported receiving a failure message which required an immediate landing of the UAS.

Narrative

On Day 0 at XA:46 hours members of the Flight Department were flying UAS missions. Multiple flights began around XB:22 hours and continued from the evening into the morning. At the time of incident the DJI Mavic Enterprise Advanced took off and was hovering near the scene in a neighborhood at about 196 ft. AGL. Hovering was over an open field area near the residential neighborhood. Personnel were on the ground and in the area. Hovering did not occur over people directly. Video of the Pilot In-Command's (PIC) control screen was broadcasting live imagery to a larger screen. Approximately 6 minutes and 17 seconds into the flight and with 60 percent battery remaining the PIC and myself observed a warning in the DJI Pilot Application indicating a 'Max Motor Speed Warning'. Within seconds the UAS was observed falling from the sky. Flight logs via Airdata indicated 'Not Enough Force/ESC Error'. The UAS was returned to DJI Repairs for evaluation and an estimate of repairs. No injuries on the ground and no property damage other than the UAS. The cause of the incident appears to be an equipment failure on the UAS itself (motor). There was no apparent flight control issue or pilot error observed. Training to occur in the future that if a pilot observes a 'Max Motor Speed Reached' error attempt to bring down the UAS immediately into a pre-designated 'offsite' landing area away from persons and property.