I am trying to update my su binary. I previously used SuperSU, but switched to CWM SuperUser and now it is telling me to update my su binary. It tells me to reboot to recovery mode which works and tries automaticaly to flash the zip. But when viewing the log, an error message shows:

Failed to map file: /cache/superuser.zip
Flashing zip failed.

I have tried manually copying the su binary but SuperUser still prompts me to update it. I have tried moving the zip file and flashing it from a different location, but I still get Failed to map file.... I am using TWRP 3.0.2-2 on SM-G900F (Samsung Galaxy S5 [klte] International) with stock Android 6.0.1.

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