Error in installing my new kernel

I have followed the instructions of LFD103 and successfully compiled the latest stable linux kernel.
But during installing newly compiled kernel, errors occurred as bellow.
Please anyone can help me.

och@LXK:~/work/repos/linux-stable$ uname -a
Linux LXK 5.4.0-74-generic #83~18.04.1-Ubuntu SMP Tue May 11 16:01:00 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

och@LXK:~/work/repos/linux-stable$ git branch
`* linux-5.12.y
master

och@LXK:~/work/repos/linux-stable$ su -c "make modules_install install"
Password:
sed: can't read modules.order: No such file or directory
Makefile:1466: recipe for target 'modinst' failed
make[1]: *** [modinst] Error 2