JDR fails with "WFLYELY01209: Unable to initialize CredentialStore" when using encrypted system properties in JBoss EAP 8.x

Issue

• JBoss Diagnostic Reporter (JDR) fails with "WFLYELY01209: Unable to initialize CredentialStore" when using encrypted system properties in JBoss EAP 8.x
• When running the JBoss Diagnostic Reporter (JDR) utility on JBoss EAP 8, the process fails to generate a report if it cannot connect to a running instance and attempts to start an internal embedded server.

• This failure specifically occurs when system properties, such as javax.net.ssl.keyStorePassword, are configured to use Elytron encrypted expressions (${ENC::...}):

  <system-properties>
      ...(snip)...
      <property name="javax.net.ssl.keyStorePassword" value="${ENC::...}"/>
  </system-properties>
  

• The following error is observed in the output:

  ERROR [org.jboss.as.controller.management-operation] (Controller Boot Thread) WFLYCTL0013: Operation ("add") failed - address: ([("system-property" => "javax.net.ssl.keyStorePassword")]) - failure description: "WFLYELY01209: Unable to initialize CredentialStore examplePropertiesCredentialStore -- WFLYELY00924: Unable to create immediately available credential store."
  FATAL [org.jboss.as.server] (Controller Boot Thread) WFLYSRV0056: Server boot has failed in an unrecoverable manner; exiting. See previous messages for details. - Server configuration file in use: standalone.xml