SM-G9550 can't repaire dead boot

Model Settings:
Interface : USB
Brand : Samsung
Model : SM-G955U
SRF : C:/Program Files/Octoplus Pro JTAG Software/firmware/SAMSUNG_SM-G955U_USB_UFS.srf
Core : Qualcomm MSM8998 UFS
Loader : QLoader_v2_Samsung

Connecting...
Sending loader... Failed.