Yesterday i wanted to root my oneplus 5. I succesfully unlocked the bootloader, and flash TWRP 3.1.1.1. Than I wanted to install Magisk v14 but I got an error message. I wanted to do a wipe cache, but accidental i format everything. When i wanted to reboot, i got the message: No OS. Than I dowloaded the offical stock ROM, and i flash the stock recovery. I wanted to flash the stock rom in sideload mode, but I coud not. My pc dont see any adb devices. Please help me!