Comment # 2 on bug 1212118 from Alexandre Vicenzi

By default, there's no group nobody in the Tumbleweed image, but Fedora has, as
shown bellow:

alexandre@localhost:~> podman run tumbleweed cat /etc/group
root:x:0:
shadow:x:15:
trusted:x:42:
users:x:100:

alexandre@localhost:~> podman run fedora cat /etc/group
root:x:0:
bin:x:1:
daemon:x:2:
sys:x:3:
adm:x:4:
tty:x:5:
disk:x:6:
lp:x:7:
mem:x:8:
kmem:x:9:
wheel:x:10:
cdrom:x:11:
mail:x:12:
man:x:15:
dialout:x:18:
floppy:x:19:
games:x:20:
tape:x:33:
video:x:39:
ftp:x:50:
lock:x:54:
audio:x:63:
users:x:100:
nobody:x:65534:
tss:x:59:

This is due to system-user-nobody package not being installed in the image.
Installing this package should fix the missing group.