Orchestrator upgrade 2019.10.17 to 2020.4 - Could not find certificate with subject


I’m trying to upgrade our Orchestrator from 2019.10.17 to 2020.4 but I have a problem at the step “Identity Server settings”. I get the message "Could not find certificate with subject XXX. Make it sure there is such certificate in the LocalMachine\Personal store " where XXX is the server name.

Our orchestrator is running on an Azure VM. We have a certificate configured for the public URL of this VM. I am wondering if it can be the cause of my problem.

Thanks for your help.