The array suddenly stops responding, the fan is spinning but there is no hard drive activation sound, and Mac cannot mount the volume. What should I do?

Applicable Models

D8-332, Thunderbolt 3

This issue is usually caused by a RAID driver anomaly. Please visit the official forum's driver guide page and follow the tutorial to reinstall the RAID driver suitable for your macOS version.
https://support.terra-master.com/quickguide/steps?product=D8-332&page=17