I think your error is because of the special characters in the name of your
working directory: "ダウンロード". Change that directory name from
/home/fuckoff/ダウンロード/ to /home/fuckoff/SurferDudeApps/ or
something like that. Don't name it with Japanese characters, and don't give
it any name that would have a space in it. For example, don't name it
/home/fuckoff/Surfer Dude's Apps/
If that doesn't work, the error might mean that you have to run "make && make
install" as "sudo make && make install".
Lastly, you are using an older kernel that's from early 2018. If I was
running a modern digital tablet, I'd be seriously thinking about using a
kernel that's not over 2 years old. Lots of new kernels available at jxself's
web page: https://jxself.org/linux-libre/
