Hey,
The .rar file of the latest firmware version V3.0.0.4.H is showing as corrupt in the below given link.
https://downloads.rakwireless.com/en/LoRa/RAK811/Firmware/
Kindly request you to fix the same.
Regards,
Jithin
try to update your winrar to the latest version
Thank you… my bad, have been using the same old winrar version for all these years… so didnt check that angle out!