Streams not working

[avargasn]

I'm trying to test CGNAT into a fully virtualized environment, however streams are not coming up with the following config:
{
"interfaces": {
"network": {
"interface": "eth2",
"address": "20.20.0.2",
"gateway": "20.20.0.1",
"address-ipv6": "20:20::2",
"gateway-ipv6": "20:20::1"
},
"access": [
{
"interface": "eth1",
"outer-vlan-min": 1000,
"outer-vlan-max": 1999,
"inner-vlan-min": 2000,
"inner-vlan-max": 2999,
"authentication-protocol": "PAP"
}
]
},
"ppp": {
"authentication": {
"username": "cgnat{inner-vlan}",
"password": "cgnat"
},
"lcp": {
"keepalive-interval": 120
}

},
"session-traffic": {
    "ipv4-pps": 1,
    "ipv6-pps": 1,
    "ipv6pd-pps": 1

},
"streams": [
    {
        "name": "nat",
        "stream-group-id": 1,
        "type": "ipv4",
        "direction": "both",
        "nat": true,
        "pps": 100
    }
]

}

A similar question was posted here, but I have already fixed the missing square brackets, and the single stream named nat is not coming up. Am I missing anything?

bngblaster version is 0.9.4 installed over Ubuntu 22.04.