Originally Posted by FernBch
I have the Verizon SCH-I545, MDK bootloader, and am running JDC Team's AOSP 6.0.
I am unable to install any version of SU above 2.52. TWRP 22.214.171.124 and 126.96.36.199 by Antaresone and the official 188.8.131.52 all fail with the same message.
Solution 1(Tricky, and may not work) :
Try to mount data and system using mount option and remove mounting script on the updater-binary.
Then, use TWRP file manager to remove /supersu manually.
At last, install the zip again.
Solution 2 (not really a solution) :
If you really cant mount data or system, ask the rom dev or someone on your phone's forum for solution.
Solution 3 (1% chance of working) :
Dont bother about the bootloader.
Check your boot image instead.
Solution 4 :
Check if you have chcon on system/bin.
If not download this file and move it into system/bin.