Fleet Elastic Agent enrolled but no logs are being sent

Hi,
I have a problem with one of my agent
I installed the agent from Kibana Fleet page as I did with all my other agents but this one doesn't send any logs
I have two integration activated:

  • system
  • custom udp logs
    The custom udp logs is configured to receive logs on port 5141
    I noticed that after the agent installation, on the linux server I can't see the port 5141 listening
    Even if I check the agent details page in the Fleet menu and open the integration details, they all have a black icon
    I also checked the agent logs but I get this message:
    There are no log messages to display.

Can someone help me?