mdadm:-3:Invalid JSON

poller log

I use docker-compose to create librenms and databse containers
then follow the page to install mdadm application.
but there’s always error drawing graph , so I run ther poller and see the invalid JSON error

here are my environment , and the client OS is proxmox VE (debian 9)

Version 	1.67-7-gf80fa5a42 - Mon Sep 07 2020 22:45:59 GMT+0800
Database Schema 	2020_08_28_212054_drop_uptime_column_outages (173)
Web Server 	nginx/1.14.0
PHP 	7.4.7
Python 	3.6.9
MySQL 	10.5.5-MariaDB-1:10.5.5+maria~focal
Laravel 	7.19.0
RRDtool 	1.7.0

sorry , only two link per post …

if client runs ubuntu 14.04
thare is another problem.

mdadm:-2:Empty return from snmp_get.