[Magisk] Aaren11:
Hi, I seem to be having similar issues to the poster above me. After mounting system in recovery and flashing the zoo I receive no toast or vibration to indicate Fear is running. Checking the sdcard/android directory, there is no FDE_log either. All the files seem to have installed correctly, but when I run the feradroid.sh script manually bus terminal emulator, it throws a bunch of errors about a missing systen/engine/bin/busybox - however the file is there when I check the directory myself and copying a fresh version of it doesn't alleviate the issue.

elsa:/ $ su
elsa:/ # system/engine/feradroid.sh
chmod: /sdcard/Android/FDE_config.txt: No such file or directory
Syntax error in "allow mediaserver mediaserver_tmpfs:file { read write execute }"

Supported policy statements:

"allow #source-class #target-class permission-class #permission"
"deny #source-class #target-class permission-class #permission"
"auditallow #source-class #target-class permission-class #permission"
"auditdeny #source-class #target-class permission-class #permission"
"typetrans source-class target-class permission-class default-class (optional: object-name)"
"allowxperm #source-class #target-class #permission-class ioctl range"
"auditallowxperm #source-class #target-class #permission-class ioctl range"
"dontauditxperm #source-class #target-class #permission-class ioctl range"
"create #class"
"permissive #class"
"enforcing #class"
"attradd #class #attribute"

source-class and target-class can be attributes (patches the whole group)
All sections (except typetrans) can be replaced with '*' to patch every possible matches
Sections marked with '#' can be replaced with collections in curly brackets
e.g: allow { source1 source2 } { target1 target2 } permission-class { permission1 permission2 }
Will be expanded to:
allow source1 target1 permission-class permission1
allow source1 target1 permission-class permission2
allow source1 target2 permission-class permission1
allow source1 target2 permission-class permission2
allow source2 target1 permission-class permission1
allow source2 target1 permission-class permission2
allow source2 target2 permission-class permission1
allow source2 target2 permission-class permission2

Syntax error in "allow audioserver audioserver_tmpfs:file { read write execute }"

Supported policy statements:

"allow #source-class #target-class permission-class #permission"
"deny #source-class #target-class permission-class #permission"
"auditallow #source-class #target-class permission-class #permission"
"auditdeny #source-class #target-class permission-class #permission"
"typetrans source-class target-class permission-class default-class (optional: object-name)"
"allowxperm #source-class #target-class #permission-class ioctl range"
"auditallowxperm #source-class #target-class #permission-class ioctl range"
"dontauditxperm #source-class #target-class #permission-class ioctl range"
"create #class"
"permissive #class"
"enforcing #class"
"attradd #class #attribute"

source-class and target-class can be attributes (patches the whole group)
All sections (except typetrans) can be replaced with '*' to patch every possible matches
Sections marked with '#' can be replaced with collections in curly brackets
e.g: allow { source1 source2 } { target1 target2 } permission-class { permission1 permission2 }
Will be expanded to:
allow source1 target1 permission-class permission1
allow source1 target1 permission-class permission2
allow source1 target2 permission-class permission1
allow source1 target2 permission-class permission2
allow source2 target1 permission-class permission1
allow source2 target1 permission-class permission2
allow source2 target2 permission-class permission1
allow source2 target2 permission-class permission2

mount: '/dev/block/bootdevice/by-name/userdata'->'/data': Device or resource busy
system/engine/feradroid.sh[97]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[98]: mount: not found
system/engine/feradroid.sh[99]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[100]: mount: not found
system/engine/feradroid.sh[101]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[106]: sync: not found
system/engine/feradroid.sh[107]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[108]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[109]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[110]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[111]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[112]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[113]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[114]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[115]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[116]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[117]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[155]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[155]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[163]: can't create /system/engine/prop/score: No such file or directory
system/engine/feradroid.sh[164]: can't create /system/engine/prop/score: No such file or directory
system/engine/feradroid.sh[167]: can't create /system/engine/prop/score: No such file or directory
system/engine/feradroid.sh[250]: sync: not found
system/engine/feradroid.sh[251]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[252]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[253]: sysctl: not found
system/engine/feradroid.sh[254]: can't create /system/engine/prop/score: No such file or directory
system/engine/feradroid.sh[268]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[269]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[270]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[270]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[271]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[272]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[272]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[273]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[273]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[274]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[274]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[275]: can't create /system/engine/prop/score: No such file or directory
system/engine/feradroid.sh[276]: sync: not found
system/engine/feradroid.sh[277]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[292]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[292]: setenforce: not found
system/engine/feradroid.sh[292]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[292]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[293]: setprop: not found
system/engine/feradroid.sh[294]: setprop: not found
system/engine/feradroid.sh[295]: setprop: not found
system/engine/feradroid.sh[296]: can't create /system/engine/prop/score: No such file or directory
system/engine/feradroid.sh[297]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[298]: service: not found
system/engine/feradroid.sh[299]: setprop: not found
system/engine/feradroid.sh[300]: can't create /system/engine/prop/score: No such file or directory
system/engine/feradroid.sh[301]: svc: not found
system/engine/feradroid.sh[302]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[303]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[304]: can't create /system/engine/prop/score: No such file or directory
system/engine/feradroid.sh[305]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[306]: can't create /system/engine/prop/score: No such file or directory
system/engine/feradroid.sh[307]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[308]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[309]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[310]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[311]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[312]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[313]: msg: not found
system/engine/feradroid.sh[314]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[315]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[316]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[317]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[318]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[319]: msg: not found
system/engine/feradroid.sh[320]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[321]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[322]: msg: not found
system/engine/feradroid.sh[326]: sync: not found
system/engine/feradroid.sh[327]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[328]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[329]: mount: not found
system/engine/feradroid.sh[335]: /system/engine/bin/busybox: not found
system/engine/feradroid.sh[335]: grep: not found
system/engine/feradroid.sh[335]: cut: not found
system/engine/feradroid.sh[358]: sync: not found
system/engine/feradroid.sh[359]: /system/engine/bin/busybox: not found
elsa:/ #

I'm on a V20 device running 7.0.1 (WETA ROM) and Magisk 13.1, please find my log attached and let me know if you require any further information.