FP3: Rooted, formatted userdata, now it won't boot

Thank you very much.

I just flashed k4y0z’s 8901.2.A.0110 image via TWRP, yet the phone still does not boot. During the flashing process, TWRP was also unable to mount /data and /storage.

Do you have any idea how to fix that problem?

Edit: Nevermind, apparently it’s necessary to flash the stock 0105 image, not the 0110 image.