The commands were copy and pasted from the instructions here.
Here is the terminal output:-
root@mint:/mnt# wget
https://download2.terra-master.com/bzImage.zip
--2022-06-23 17:48:26--
https://download2.terra-master.com/bzImage.zip
Resolving download2.terra-master.com (download2.terra-master.com)... 8.208.41.140
Connecting to download2.terra-master.com (download2.terra-master.com)|8.208.41.140|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 37623188 (36M) [application/x-zip-compressed]
Saving to: ‘bzImage.zip’
bzImage.zip 100%[===============================================>] 35.88M 2.42MB/s in 14s
2022-06-23 17:48:41 (2.53 MB/s) - ‘bzImage.zip’ saved [37623188/37623188]
root@mint:/mnt# unzip bzImage.zip
Archive: bzImage.zip
inflating: Burn USB hard drive system Instruction.txt
inflating: bzImage
inflating: grub.cfg
inflating: make_install
root@mint:/mnt# chmod +x make_install
root@mint:/mnt# chmod +x grub.cfg
root@mint:/mnt# ./make_install
#########mkfs ext4#############
mke2fs 1.46.2 (28-Feb-2021)
/dev/sdb1 contains a vfat file system labelled 'USB STICK'
Proceed anyway? (y,N) y
Creating filesystem with 3907840 4k blocks and 977280 inodes
Filesystem UUID: c3c13f0a-f3c8-4e56-9d8c-de18eb4f9d85
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208
Allocating group tables: done
Writing inode tables: done
Creating journal (16384 blocks): done
Writing superblocks and filesystem accounting information: done
#########install grub###########
Installing for x86_64-efi platform.
grub-install: error: /media/ doesn't look like an EFI partition.
#########done##################
################