使用SDK 2.0.1.20 ＆ 臨時授權文件時，出現以下錯誤。

請問有人有遇過同樣的問題？

request failed: https://openapi.baidu.com/oauth/2.0/token?grant_type=client_credentials&client_id=null&client_secret=null

W/System.err: java.io.FileNotFoundException: https://openapi.baidu.com/oauth/2.0/token?grant_type=client_credentials&client_id=null&client_secret=null

W/System.err:     at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:238)

W/System.err:     at com.android.okhttp.internal.huc.DelegatingHttpsURLConnection.getInputStream(DelegatingHttpsURLConnection.java:210)

W/System.err:     at com.android.okhttp.internal.huc.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:25)

 W/System.err:     at com.baidu.speech.EventManagerDec.requestHttpGet(EventManagerDec.java:391)

 W/System.err:     at com.baidu.speech.EventManagerDec.send(EventManagerDec.java:140)

 W/System.err:     at com.baidu.speech.EventManagerDec.send(EventManagerDec.java:101)

 W/System.err:     at com.baidu.speech.EventManagerDecProxy.send(EventManagerDecProxy.java:121)

 W/System.err:     at com.baidu.speech.EventManagerMessagePool$1.run(EventManagerMessagePool.java:46)

 W/System.err:     at android.os.Handler.handleCallback(Handler.java:743)

 W/System.err:     at android.os.Handler.dispatchMessage(Handler.java:95)

W/System.err:     at android.os.Looper.loop(Looper.java:150)

W/System.err:     at android.os.HandlerThread.run(HandlerThread.java:61)