Sahara fail while trying to flash a rom into my phone

I tried to flash a custom rom into my phone but it was an unsuccessful try and I decided to update the TWRP recovery in order to increase my chances to flash a rom. But istead of updating TWRP I bricked my phone somehow I even don't understand. The phone is **Lenovo ZUK Z2**. I tried to flash a stock rom via QFIL previously installing all drivers needed. But when I actually press the download button it says: Validating Application Configuration Load APP Configuration COM:20 SAHARA:True SAHARA:C:\ZUI\prog_emmc_firehose_8996_ddr.elf SEARCHPATH:C:\ZUI RAWPROGRAM: rawprogram0.xml PATCH: patch0.xml ACKRAWDATAEVERYNUMPACKETS:False ACKRAWDATAEVERYNUMPACKETS:100 MAXPAYLOADSIZETOTARGETINBYTES:False MAXPAYLOADSIZETOTARGETINBYTES:49152 DEVICETYPE:eMMC PLATFORM:8x26 VALIDATIONMODE:0 RESETAFTERDOWNLOAD:False MAXDIGESTTABLESIZE:8192 SWITCHTOFIREHOSETIMEOUT:30 RESETTIMEOUT:200 RESETDELAYTIME:2 FLATBUILDPATH:C:\ FLATBUILDFORCEOVERRIDE:True QCNPATH:C:\Temp\00000000.qcn QCNAUTOBACKUPRESTORE:False SPCCODE:000000 ENABLEMULTISIM:False Load ARG Configuration Validating Download Configuration Image Search Path: C:\ZUI RAWPROGRAM file path: C:\ZUI\rawprogram0.xml PATCH file path:C:\ZUI\patch0.xml Programmer Path:C:\ZUI\prog_emmc_firehose_8996_ddr.elf Process Index:0 Start Download Program Path:C:\ZUI\prog_emmc_firehose_8996_ddr.elf Binary build date: May 13 2015 @ 14:41:37 QSAHARASERVER CALLED LIKE THIS: 'C:\Program Files (x86)\Qualcomm\QPST\bin\QSaharaServer.exe -p \\.\COM20 -s 13:C:\ZUI\prog_emmc_firehose_8996_ddr.elf 'Current working dir: C:\Users\vladi\AppData\Roaming\Qualcomm\QFIL Sahara mappings: 2: amss.mbn 6: apps.mbn 8: dsp1.mbn 10: dbl.mbn 11: osbl.mbn 12: dsp2.mbn 16: efs1.mbn 17: efs2.mbn 20: efs3.mbn 21: sbl1.mbn 22: sbl2.mbn 23: rpm.mbn 25: tz.mbn 28: dsp3.mbn 29: acdb.mbn 30: wdt.mbn 31: mba.mbn 13: C:\ZUI\prog_emmc_firehose_8996_ddr.elf 17:01:24: ERROR: function: sahara_rx_data:194 Unable to read packet header. Only read 0 bytes. 17:01:24: ERROR: function: sahara_main:854 Sahara protocol error 17:01:24: ERROR: function: main:265 Uploading Image using Sahara protocol failed Download Fail:Sahara Fail:QSaharaServer Fail:Process fail Finish Download The phone is in fastboot mode all the time. I tried to follow a dozen of howtos but no of them helped. I also used MiFlash, here are the error and the phone state: