Please note loading the kernel module this way will not survive reboot. So this should be done after every reboot.
To have it automatically loaded wait for the deb and install it
then start then start indi with drivers you need with sudo otherwise fli devices will not work:
sudo indiserver ...
Third attempt to fix it for linux 4.8
Can you try the provided tgz.
If this does not work then it is not the KO. This is the last option I have with the KO to fix it....
sudo rmmod fliusb
cd fliusb-1.3
make
sudo insmod ./fliusb.ko