Everything looks to be functioning.
There are no other running processes using the card.
$ ps aux | grep lora
Please open a ticket at support.multitech.com.
We may need to share a packet forwarder binary with lower level debug messages enabled.
The lgw_start function is not returning OK.
https://github.com/Lora-net/lora_gateway/blob/master/libloragw/src/loragw_hal.c