What should I do if there is a "command error" when playing back in the mobile app?

Follow the steps below.
1. Make sure that the host has a hard disk installed and is working normally, and the hard disk is in good condition.
2. Check whether the recording settings are turned on and whether the red dot video icon is displayed in the lower left corner of the channel to confirm whether the playback can be done normally.
3. Check whether the console and mobile app versions are up-to-date, if not, please update them first.
4. Reboot your console.