I unlocked my LG G4 device using this guide and installed twrp-3.2.0.2-1-h815
recovery.
All worked just well, then I downloaded SuperSU by Chainfire, placed it into my device and installed the SuperSU zip file from the recovery mode.
Now the phone doesn't boot up fully but gets stuck at the LG logo.
I'm out of ideas and I looked for solution for hours and found nothing.