CPU in dashboard does not update

OS Name/Version: Ubuntu 20.04 (64bit)

Product Name/Version: AMP Release “Triton” v2.3.4.3

Problem Description:
The CPU load display does not work.
I have already updated AMP and tried it on various servers, including Arma 3, Minecraft and V Rising.
It did not work on all three of the aforementioned server instances.
With kind regards
p.s. I am not the owner, but developer of the owner.

Steps to reproduce:
Unfortunately, I do not know of any way to restore this. I have been working with AMP for a long time and this is the first time something like this has happened.

Actions taken to resolve so far:
New installation of AMP, update of AMP, other servers installed to control, instances updated.