Segmentation fault when rooting - adb shell /sbin recovery

Hello,
I am rooting my Huawei P8 Lite, following the XDA guide
forum.xda-developers/p8lite/general/step-step-guide-to-unlock-bootloader-t3150616


every thing goes fine untill I enter :
adb.exe shell /sbin/recovery --update_package=/su.zip
but I am getting an error
Segmentation fault

I dont get it :( I am blocked for rooting, can any one help please
Thanks

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