Ubuntu: APFS: wrong fs type, bad option, bad superblock on /dev/sda2, missing ....

Hello,

I've just purchased and tried to use the APFS driver for Linux on Ubuntu 18.04 LTS which is running dual boot with MacOS on my iMac.
I'm trying to access the Macintosh Disk from Linux.

I've installed as root as per the instructions and the installer ran fine.

root@imac:/home/chris/Downloads/paragon# ./install.sh
By installing this software you accept the terms of End User License Agreement listed in License file.
Continue installing? [yes/no/read].
yes
Searching and removing previously installed UFSD driver in /lib/modules/4.15.0-50-generic/
Would you like UFSD driver to rebuild after kernel updates? [yes/no]
yes
Setting DKMS configuration
Preparing to install
This system doesn't support Secure Boot
Secure Boot not enabled on this system.
Building and installing driver to kernel 4.15.0-50-generic
Driver was installed to system
Setting driver autoload at system startup
Setting driver autoload at system startup
Installation complete!


Then
mkdir /mnt/apfs_disk
exit

However:

sudo mount -t uapfs /dev/sda2 /mnt/apfs_disk
mount: /mnt/apfs_disk: wrong fs type, bad option, bad superblock on /dev/sda2, missing codepage or helper program, or other error.

In syslog:
May 31 15:01:21 imac kernel: [20239.850683] uapfs: failed to mount "sda2"

Please advise !

Many thanks