Issue Issue with Atomic Advanced (bought from Plesk)

[jl07]

We have purchased Atomic Advanced though plesk and are having issues activating it through the settings.
When activating the following error appears within the mode security rule set page

modsecurity_ctl failed: gpg: key FFBD5D0A4520AFA9: "Atomicorp (Atomicorp Official Signing Key) <[email protected]>" not changed
gpg: Total number processed: 1
gpg: unchanged: 1
gpg: assuming signed data in '/tmp/tmpexHV7m/aum'
gpg: Signature made Tue Oct 20 06:39:14 2020 AEDT
gpg: using RSA key 181866DF9DACA40E5B429B08FFBD5D0A4520AFA9
gpg: Good signature from "Atomicorp (Atomicorp Official Signing Key) <[email protected]>" [unknown]
gpg: WARNING: This key is not certified with a trusted signature!
gpg: There is no indication that the signature belongs to the owner.
Primary key fingerprint: 1818 66DF 9DAC A40E 5B42 9B08 FFBD 5D0A 4520 AFA9
TERM environment variable not set.
W: --force-yes is deprecated, use one of the options starting with --allow instead.
--2020-10-22 15:49:10-- https://www.atomicorp.com/RPM-GPG-KEY.atomicorp.txt
Resolving www.atomicorp.com (www.atomicorp.com)... 74.208.77.16
Connecting to www.atomicorp.com (www.atomicorp.com)|74.208.77.16|:443... Warning: apt-key output should not be parsed (stdout is not a terminal)
connected.
HTTP request sent, awaiting response... 200 OK
Length: 1694 (1.7K) [text/plain]
Saving to: 'STDOUT'

0K . 100% 301M=0s

2020-10-22 15:49:11 (301 MB/s) - written to stdout [1694/1694]


WARNING: apt does not have a stable CLI interface. Use with caution in scripts.


WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

E: Unable to locate package aum
Command '/bin/bash < /tmp/tmpexHV7m/aum' returned non-zero exit status 1
Unable to download tortix rule set

Plesk and OS details below:
Product version: Plesk Obsidian 18.0.30.2
OS version: Ubuntu 18.04 x86_64

Any assistance would be greatly appreciated