Unable To Retrieve "fw.txt"


I tried to update the firmware of my laird gateway using this update URL:

However, there was an error during firmware update:

Downloading ‘fw.txt’ from connectivity-firmware.s3.amazonaws.com to /tmp/fw.txt
…could not retrieve “fw.txt”
/usr/sbin/fw_update: line 463: o_ping: not found
wget: unable to resolve host address ‘connectivity-firmware.s3.amazonaws.com

Please advise on how to get this resolved. Thank you.