Did you follow all instructions from here:
https://xdaforums.com/t/rom-development-9-0-lineageos-16-0-pollux-pollux_windy-unofficial.3924942/
You might also try even A13 based version:
Did you follow all instructions from here:
https://xdaforums.com/t/rom-development-9-0-lineageos-16-0-pollux-pollux_windy-unofficial.3924942/
You might also try even A13 based version: