Add Cisco ACI - Cert problem?

Add Cisco ACI - Cert problem?

Hy,
i'm trying to add Cisco ACI to the OPM.
My hypothesis is that this is a certificate problem. 

My  user/pass is good because it works if I use it on my browser.
I created ACI profile and tried to add ACI but I get instant fail w/o waiting for timeout. (add-aci-fail picture)

I've tried to import a certificate from my ACI to OPM, and it went succesfully.
(pictures cert-import and cert-import-ok)

Error when trying to add ACI doesn't change.

I've captured this conversation beetween OPM and my APIC on my Firewall,
and I can see this:
tcp/443 connection stablishes correctly
when trying to establish tls 1.2 OPM fails to send certificate in Client Hello packet.
after that tcp/443 connection terminates with FIN/ACK, ACK.

I didn't add any SNMP or WMI credentials at this time.

Is there a certificate repository to check if this cert has been imported correctly?
is there a problem with certificate expiry date?

What can I do or check in this situation?

Ty,

 

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