My macbook pro 13' 2015 keyboard and track pad not working Suddenly the keyboard and trackpad of my macbook pro 13' 2015 model stopped working, this issue happened when I upgrade from sierra to high sierra. Also I already tried re-installing the OS from the internet recovery way, still the issue is present. Then I tried booting my macbook pro on Remix OS (android) both the keyboard and trackpad is working fine.
I recommend resetting the SMC and the NVRAM (PRAM) 1st and see if they help get the keyboard and/or the trackpad working again.

Since they work on Remix OS it could also be a software issue, after you reset the SMC and NVRAM if neither starts working then try safe mode. If it doesnt work in safe mode (safe boot) then try with another user account. If the same results then you'll need to backup your Mac and then reinstall MacOS.

If it still persists afterwards than it may be a connection error, you'll need to take it to the Apple Store. 

But do everything else 1st.