I messed up installing the jailbreak.
Kindle Paperwhite 11 firmware 5.16.2.1.1
It looks as if the Internet was turned off, but I am sure that I turned it on and started uploading the modification as soon as possible. The worst thing is that in the madness of looking for a solution, I overwrote the backup copy with a modification
After uploading and restarting, I cannot run airplan mode and updates. Everything is greyed out. Trying to repeat the steps does not help because after reaching the power on screen, the computer does not see the Kindle partition. Is there any way to restore functionality and install a jailbreak?