どゆこと? お前等も同じですか?
$ mkdir mountpoint
$ sudo mount Siki-0.1.37.AppImage mountpoint/
NTFS signature is missing.
Failed to mount '/dev/loop0': 無効な引数です
The device '/dev/loop0' doesn't seem to have a valid NTFS.
Maybe the wrong device is used? Or the whole disk instead of a
partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?
$

参考書 https://docs.appimage.org/user-guide/run-appimages.html#mount-an-appimage
For type 1 AppImages: 項