Not able to received Link margin data on LoraServer

@velev @ZhuQI @Fomi
Hardware - RPi 3B+ and RAK833 SPI
Firmware -
Server - LoraServer
Link margin data has not seen on LoraServer.I know that there is a problem with scripts.
We can test it.

This is image is not upgraded to ChirpStack yet. Soon it will be. So please install from here
This is our latest firmware including new ChirpStack (known as LoRaServer)
Also give the settings of end devices, ADR, ch, etc.