installation problem on Ubuntu 20.04

[Fluoo]

Hello,

I used Fail2Rest on my old server and now I try to install it on my new server because I migrate it.
I have made all the installation with no error, Fail2Rest service is active but it seems that the server is not listening on port 5010.
Can you help me ?

Ubuntu 20.04.2 LTS (GNU/Linux 5.4.0-77-generic x86_64)
go version go1.16.5 linux/amd64

fail2ban-client status
Status
|- Number of jail: 1
`- Jail list: sshd

service fail2rest status
● fail2rest.service - fail2ban REST server
Loaded: loaded (/etc/systemd/system/fail2rest.service; enabled; vendor preset: enabled)
Active: active (running) since Tue 2021-06-29 17:57:59 CEST; 12min ago
Docs: man:fail2rest(1)
Main PID: 8768 (fail2rest)
Tasks: 6 (limit: 76742)
Memory: 1.7M
CGroup: /system.slice/fail2rest.service
└─8768 /usr/bin/fail2rest -config=/etc/fail2rest.json

Jun 29 17:57:59 vil.fluoo.com systemd[1]: Started fail2ban REST server.

cat /etc/fail2rest.json
{
"Addr": "127.0.0.1:5000",
"Fail2banSocket": "/var/run/fail2ban/fail2ban.sock"
}

ss -l | grep 5010
(Nothing here)

On my old server :
ss -l | grep 5010
tcp LISTEN 0 128 127.0.0.1:5010 :

Regards.