Question Error Web Application Firewall

[LucaB.]

Hi,
I get this error on my Plesk 12.5.30 Update #64:

Error: Failed to update the ModSecurity rule set: modsecurity_ctl failed: gpg: key 4520AFA9: "Atomicorp (Atomicorp Official Signing Key) <support@atomicorp.com>" not changed
gpg: Total number processed: 1
gpg: unchanged: 1
gpg: Signature made Mon Apr 3 19:43:23 2017 CEST using RSA key ID 4520AFA9
gpg: Good signature from "Atomicorp (Atomicorp Official Signing Key) <support@atomicorp.com>"
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.
aum failed with exitcode 3.
stdout:



Checking versions ...

-------------------------------------------------------------------------------
Errors were encountered:

L CODE SOURCE MESSAGE
- ---- ----------------------------- ------------------------------------------
[1;31m3 16 ASLCommon::get_lock Another instance of ASL is running.
[0m123.123.123.123


stderr:
Unable to download tortix rule set

I've searched on other posts but I don't find any similar.

Can you help me?

Thanks.

Luca