Can't get out of TWRP

I tried to update my FP2 to the newest version, but once I was in TWRP, I was not able to come back to the normal system. What should I do? I’m really not technical. In the code I had when it was trying to update: cannot find /system.
It’s pretty hard because it looks like I will never use the phone again.
Is there a way to fix it? Can you help me?

Clément (@clem.radio)

Edit: I don’t think my phone is rooted.

2 posts were merged into an existing topic: FP2 does not start after update