[SuperSU] CRJ343:
I've successfully unlocked the bootloader of my HTC One M8 (Android 6.0) and installed TWRP 3.4.0.1 but I am unable to install any version of SuperSU by flashing the zip through TWRP

Here is a copy of the TWRP log illustrating problems when I tried to install Super SU via TWRP

(I also tried v2.78, v2.79, v2.82 with similar outcomes)

I:Set page: 'install'

I:Set page: 'flash_confirm'

I:Set page: 'flash_zip'

I:operation_start: 'Flashing'

Installing zip file '/external_sd/UPDATE-SuperSU-v2.76-20160630161323.zip'

Checking for Digest file...

Unmounting System...

I:Update binary zip

Verifying package compatibility...

Package doesn't contain compatibility.zip entry

I:Extracting updater binary 'META-INF/com/google/android/update-binary'

I:Zip does not contain SELinux file_contexts file in its root.

I:Legacy property environment not used in updater.

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SuperSU installer

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- Mounting /system, /data and rootfs

mount: '/dev/block/mmcblk0p47'->'/data': Device or resource busy

mount: '/' not in /proc/mounts

2+0 records in

2+0 records out

2 bytes transferred in 0.001 secs (2000 bytes/sec)

3+0 records in

3+0 records out

3 bytes transferred in 0.001 secs (3000 bytes/sec)

12+0 records in

12+0 records out

12 bytes transferred in 0.001 secs (12000 bytes/sec)

3+0 records in

3+0 records out

3 bytes transferred in 0.001 secs (3000 bytes/sec)

/tmp/updater[841]: /system/toolbox: not found

- Extracting files

Archive: /external_sd/UPDATE-SuperSU-v2.76-20160630161323.zip

inflating: common/chromeos/kernel_data_key.vbprivk

inflating: mips/supolicy

inflating: armv7/supolicy

inflating: arm/chattr.pie

inflating: common/chromeos/kernel.bootloader

inflating: x86/supolicy

inflating: arm64/libsupol.so

inflating: mips/sukernel

inflating: armv7/sukernel

inflating: common/chromeos/kernel.keyblock

inflating: mips64/libsupol.so

inflating: mips/libsupol.so

inflating: mips64/su

inflating: x86/chattr

inflating: x86/sukernel

inflating: x86/su

inflating: common/init.supersu.rc

inflating: common/99SuperSUDaemon

inflating: META-INF/MANIFEST.MF

inflating: arm64/chromeos/futility

inflating: x64/libsupol.so

inflating: META-INF/CERT.RSA

inflating: x86/chattr.pie

inflating: common/Superuser.apk

inflating: META-INF/com/google/android/update-binary

inflating: x86/su.pie

inflating: common/chromeos/kernel.config

inflating: META-INF/CERT.SF

inflating: common/000000deepsleep

inflating: mips64/supolicy

inflating: x64/supolicy

inflating: arm/libsupol.so

inflating: armv7/libsupol.so

inflating: mips/su

inflating: armv7/su

inflating: mips64/sukernel

inflating: x64/sukernel

inflating: x64/su

inflating: META-INF/com/google/android/updater-script

inflating: mips/chattr.pie

inflating: armv7/chattr.pie

inflating: arm/supolicy

inflating: arm/chattr

inflating: arm64/supolicy

inflating: x86/libsupol.so

inflating: arm/sukernel

inflating: arm64/sukernel

inflating: arm/su

inflating: common/launch_daemonsu.sh

inflating: arm64/su

inflating: common/install-recovery.sh

inflating: common/file_contexts_image

CANNOT LINK EXECUTABLE: cannot locate symbol "__aeabi_memcpy" referenced by "/sbin/liblog_htc_sbin.so"...

page record for 0xafcb402c was not found (block_size=16)

- Detecting system compatibility

CANNOT LINK EXECUTABLE: cannot locate symbol "__aeabi_memcpy" referenced by "/sbin/liblog_htc_sbin.so"...

page record for 0xac32802c was not found (block_size=16)

- System-less mode, boot image support required

- Creating image

CANNOT LINK EXECUTABLE: cannot locate symbol "__aeabi_memcpy" referenced by "/sbin/liblog_htc_sbin.so"...

page record for 0xb0b1903c was not found (block_size=16)

- Mounting image

mknod: /dev/block/loop0: File exists

I:Found no matching fstab entry for uevent device '/devices/virtual/block/loop0' - change

- Creating paths

mkdir: '/su/bin': File exists

mkdir: '/su/xbin': File exists

mkdir: '/su/lib': File exists

mkdir: '/su/etc': File exists

mkdir: '/su/su.d': File exists

- Removing old files

- Placing files

rm: /su/bin/su: No such file or directory

rm: /su/bin/daemonsu: No such file or directory

rm: /su/bin/supolicy_wrapped: No such file or directory

rm: /su/lib/libsupol.so: No such file or directory

rm: /su/bin/sukernel: No such file or directory

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Boot image patcher

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- Finding boot image

--- Boot image: /dev/block/mmcblk0p42

CANNOT LINK EXECUTABLE: cannot locate symbol "__aeabi_memcpy" referenced by "/sbin/liblog_htc_sbin.so"...

page record for 0xb5ae203c was not found (block_size=16)

- Extracting ramdisk

CANNOT LINK EXECUTABLE: cannot locate symbol "__aeabi_memcpy" referenced by "/sbin/liblog_htc_sbin.so"...

page record for 0xa82b103c was not found (block_size=16)

--- Failure, aborting

losetup: /dev/block/loop0: No such device or address

I:Found no matching fstab entry for uevent device '/devices/virtual/block/loop0' - change

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IMPORTANT NOTICES

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First reboot may take a

few minutes. It can also

loop a few times. Do not

interrupt the process!

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- Unmounting /system

- Done !