Hi,
I am testing Solarwinds Orion Platform 2019.2 HF1, NPM 12.5 last version, but when I try to add a node, I get this error

From WireShark:

From NET-SNMP Windows:

This file is using snmpwalk from Solarwinds "C:\Program Files (x86)\SolarWinds\Orion\SnmpWalk.exe"

Could you help me please to fix this issue!.
Thanks!