Avamar 18.2 - certificate issue

Hello,

when I'm trying to launch a backup with Avamar from a remote client to my Avamar server I get this message in Agent.log:

2020-03-02 09:42:15 avagent Error <41041>: Certificate could not be verified.

2020-03-02 09:42:15 avagent Error <5365>: Cannot connect to xxx.xxx.xxx.xxx:30001.

2020-03-02 09:42:15 avagent Info <5059>: unable to connect, sleep(60) then retrying

All required ports are opened to AVE and DD.

Any idea ?

Thanks

Radus