Sounds like you need to substitute the name of your pool for tank1Thank you.
Now, when I try to open the jails shell, I get this error and it goes down:
Code:mount_nullfs: /mnt/tank1: No such file or directory jail: /sbin/mount -t nullfs -o rw /mnt/tank1/apps/plex /mnt/iocage/jails/plex/root/config: failed
It sounds like the guide code was setting up placeholder mount points for external storage locations? Or, is this another issue?
Edit: my mistake in the jail got to /config which is your mount point