working on my android 7.1 device. steps to get it working:
- download the adbd insecure version by leroy at https://nofile.io/f/86605d8qsJs/adbd-Insecure-v2.00.apk
- install in your phone.
- run adb shell in your adb directory
- type "su" so u can get the "#"
- type "setenforce 0"
- enable insecure adbd. usb debugging turns off
- turn usb debugging on and off from developer options
- turn insecure adbd off and on again.
you can now adb pull into your pc.
Hope this helps
Haris