Troubleshooting Kindle 10th gen bricked

Hello,

I jailbroken my Kindle Paperwhite 10th generation with Winterbreak and everything went well.
I then wanted to host a website, I deleted files that I shouldn't have, and when I restarted my Kindle, it remains stuck on the screen with the tree.
I tried to hold down the power button for a long time, the screen goes white then it displays the tree again.
When I plug it into a computer, it doesn't display anything.

Thanks for your help.