Jsonnet mount rbind /var/snap permission denied

Installed jsonnet with “sudo snap install jsonnet” as per Install jsonnet on Ubuntu using the Snap Store | Snapcraft But getting permission denied error when trying to run jsonnet.

Other snap apps work fine.

This seems like a related issue but Im not as expert on fstab

Here is exact error message, snap/ubuntu version, etc

user@host:~$ jsonnet
cannot perform operation: mount --rbind /var/snap /tmp/snap.rootfs_wS6Mvd//var/snap: Permission denied
user@host:~$ jsonnet --help
cannot perform operation: mount --rbind /var/snap /tmp/snap.rootfs_TdfOJU//var/snap: Permission denied
user@host:~$ snap version
snap    2.57.1
snapd   2.57.1
series  16
ubuntu  18.04
kernel  4.15.0-192-generic
user@host:~$ ls -l /var/snap
lrwxrwxrwx 1 root root 10 Jun 23  2020 /var/snap -> /data/snap
user@host:~$ cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
/dev/mapper/sysVG-rootLV /               ext4    errors=remount-ro 0       1
# /boot was on /dev/xvda1 during installation
UUID=faa1abf4-731b-4a98-a0a2-2f3e86b2a0b7 /boot           ext4    defaults        0       2
/dev/mapper/sysVG-homeLV /home           ext4    defaults        0       2
/dev/mapper/sysVG-optLV /opt            ext4    defaults        0       2
/dev/mapper/sysVG-tmpLV /tmp            ext4    defaults        0       2
/dev/mapper/sysVG-varLV /var            ext4    defaults        0       2
/dev/mapper/vg--data-lv--data   /data   ext4    defaults        0 2
user@host:~$