WMS 1.4 OpenSSL certificats issues

Hi

In Portal Administration / Setup

I did'int manage to import an OpenSSL certificate.

First I tried with Key/Certificate Pair.

I have obtained my cert from DigiCert.

So I converted crt to pem because only PEM format is accepted (https://www.dell.com/support/manuals/fr/fr/frdhs1/wyse-wms/wms_1.4_ag/gestion-de-la-configuration-du-syst%C3%A8me?guid=guid-fd506a7f-45b9-4eb5-b657-efe39fd73139&lang=fr-fr)

When I tried to upload  cert, key and intermediate cert : Could not save at this time. Please check your certificates and try again.

So I converted them to pfx. And when I tried to upload : Failed to import certificate: Invalid certificate chain: the trustAnchors parameter must be non-empty. Select "Skip verify and Save" to skip validation. This is not recommended.

I found nothing in logs...

Any help would greatly appreciated