Cannot obtain LR1110 firmware version

[kvkc97]

I tried to get the firmware version of LR1110 using the command lr1110_bootloader_get_version() from lr1110_bootloader.c file.
As the response, I got 0 value in the firmware buffers. The value of stat register buffer[0] is coming correctly, so communication is ok. Can you help me solve this? The output for the command as displayed in COM port is attached.