Cannot access certificate private key.

Quando surgir essa mensagem de erro no arquivo de log do seu Interface Server:

Session LogOn failed. Error: Opc.Ua.ServiceResultException: Cannot access certificate private key. Subject=CN=Elipse Plant Manager Interface Server

   at Elipse.Epm.Common.TaskExtensions.PropagateOne(Exception ex)

   at Elipse.Epm.Common.TaskExtensions.WaitAndPropagate(Task task)

   at Elipse.Epm.UserApi.Session.LogOnOpcUA(String userName, String password)

   at Elipse.Epm.UserApi.Session.LogOn(String userName, String password)

   at Elipse.Epm.Collector.ServerCommunication.Connect()

Ou surgir essa mensagem de erro no arquivo de log do seu Interface Server:

Connection failed. Retrying in 3 seconds... Details: Opc.Ua.ServiceResultException: Cannot access certificate private key. Subject=CN=Elipse Plant Manager Interface Server

at Elipse.Epm.Common.TaskExtensions.PropagateOne(Exception ex)

at Elipse.Epm.Common.TaskExtensions.WaitAndPropagate(Task task)

at Elipse.Epm.UserApi.Session.LogOnOpcUA(String userName, String password)

at Elipse.Epm.UserApi.Session.LogOn(String userName, String password)

at Elipse.Epm.Collector.ServerCommunication.Connect()

at Elipse.Epm.Collector.ServerCommunication.TryConnect()

A solução é simples, apagar o certificado do Elipse Plant Manager para que ela seja criado novamente, o passo a passo de imagens abaixo: