LG G4 was rooted, now it´s gone
I have a g4 with a problem. I was fully rooted, then i reset it using TWRP recovery with intentions of selling it, but ended up keeping it. But now when I boot into TWRP and install SU version 2.48, it says I am successful, but when I check my system for SU, it is not there. I go to the play store and download it manually, but when i launch it, it says I am not rooted.
I tried to reflash it, it agains says it was successful, boot up, click on SU and it says it is not installed.
What can i do to fix this?