please help I cant install twrp on my lg g2 running kk. I updated through flashing the stock kk on twrp it wiped out everything so I just down grading back to the stock 4.2.2 using the flash tool qnd the mobile drivers and then rerooted. I flashed it back to a diff kk stock that was supposed to have a removed boot loader I tried to flash twrp and now I get a boot certificate error and now the return to stock trick wont freaking work any advice would help thank you in advance