Please download and install the development branch version of the driver (the second link) from this post: Zemismart Zigbee 1/2/3/4 gang light switches - #36 by kkossev
The recommended procedure is to first delete the device from the HE device web page, wait 1 minute, then pair the switch again to HE. The "Zemismart ZigBee Wall Switch Multi-Gang" driver should be assigned automatically this time.
Let me know if this driver will work for you.
