No idea there, just assuming, since there’s no indication that you have succeeded on Friday 
Anyway, I’m running a test on an RPi, everything seem to work. Getting the CPU/RAM/HDD
snmpd installation
sudo apt install snmpd -y
LibreNMS on the same test container that we tested
Try setting the config file with a bare minimum, if that works, at least we know the problem lies in setting up snmpd.conf
Note: remember to restart snmpd , it has happened to me a few times 