Bootloop and no usb debug

My gf's huawei p8lite 2017 has gone into boot loop for no reason at all, she has everything stock and the usb debug is off. I tried to erase the cache from fastboot but I'm not allowed, as well as flash the boot.img recovery.img or anything at all; I also tried adb but obliviously it didn't work and there is no way to get into recovery mode just fastboot & rescue mode or being stuck into the boot loader. There is any chance to unlock it or at least save the data?