OK... now oxd-server is upgraded to 3.1.4... getting a new error:
In the browser, after configuration Wordpress plugin:
Error: call to URL https://vva-er-gluu.eresources.com:8443/setup-client failed with status 500, response Command response is null, please check oxd-server.log file of oxd-server application., curl_error , curl_errno 0
From oxd-server.log:
2018-10-30 15:55:08,496 TRACE [org.xdi.oxd.server.Processor] Command: {"command":"get_client_token","params":{"scope":null,"algorithm":null,"client_id":"@!BD71.78A2.3E61.821D!0001!51D5.A9C9!0008!1BBD.DBF4.F286.A646","":"ca56d277-bd3e-4be1-af0c-282c827d2d85","op_host":"https://vva-er-gluu.eresources.com","op_discovery_path":null,"authentication_method":null,"key_id":null}}
2018-10-30 15:55:08,499 TRACE [org.xdi.oxd.server.service.HttpService] Created TRUST_ALL client.
2018-10-30 15:55:08,522 ERROR [org.xdi.oxd.server.op.GetClientTokenOperation] access_token is blank in response, params: GetClientTokenParams{clientId='@!BD71.78A2.3E61.821D!0001!51D5.A9C9!0008!1BBD.DBF4.F286.A646', opHost='https://vva-er-gluu.eresources.com', opDiscoveryPath='null', scope=null, authenticationMethod='null', algorithm='null', keyId='null'}, response: org.xdi.oxauth.client.TokenResponse@5b2f83b4