It was a very long story...

Hi everyone. I'm having trouble installing Ubuntu Touch on my OnePlus 3T. I'm using the latest UBports installer on a Windows 10 laptop. ADB and fastboot work fine, and the bootloader is unlocked. The installer successfully flashed TWRP, and I followed all the instructions (wiped and verified the ext4 partitions). However, after rebooting, I got stuck here [укажите на фото/скриншот]. I also tried manually flashing TWRP via fastboot before running the installer, but the result is the same. What am I missing?