So I just downloaded it and gave it a go. I also had no problem burning an iso.
[derek@archcinnamon ~]$ pacman -Qi mintstick
Name : mintstick
Version : 1.4.4-1
Description : A GUI to write .img or .iso files to a USB Key. It can also format them
Architecture : any
URL : http://packages.linuxmint.com/pool/main/m/mintstick
Licenses : GPL
Groups : None
Provides : None
Depends On : coreutils desktop-file-utils dosfstools e2fsprogs exfat-utils
glib2 gtk3 ntfs-3g parted polkit procps-ng python python-dbus
python-gobject python-pyparted python-xapp udisks2 util-linux
xapps
Optional Deps : None
Required By : None
Optional For : None
Conflicts With : mintstick-git
Replaces : None
Installed Size : 113.35 KiB
Packager : Pedro Henrique Lara Campos <root@pedrohlc.com>
Build Date : Wed 02 Dec 2020 07:35:15 AM PST
Install Date : Wed 16 Dec 2020 08:36:19 AM PST
Install Reason : Explicitly installed
Install Script : No
Validated By : Signature
[derek@archcinnamon ~]$
Please make sure you’re completely up to date yay
and that you have all of my same packages/dependencies installed.
If all packages can’t be updated, please clear your cache and update again pacman -Sc
followed by pacman -Syyu
If that is still unsuccessful, please cleanbuild the package again from the AUR.