我收到错误
com.twitter.sdk.android.core.TwitterApiException: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.
at retrofit.RestAdapter$RestHandler.invokeRequest(RestAdapter.java:390)
at retrofit.RestAdapter$RestHandler.access$100(RestAdapter.java:220)
at retrofit.RestAdapter$RestHandler$2.obtainResponse(RestAdapter.java:278)
at retrofit.CallbackRunnable.run(CallbackRunnable.java:42)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at retrofit.Platform$Android$2$1.run(Platform.java:142)
at java.lang.Thread.run(Thread.java:818)
Authorization completed with an error
com.twitter.sdk.android.core.TwitterAuthException: Failed to get request token
at com.twitter.sdk.android.core.identity.OAuthController$1.failure(OAuthController.java:95)
at com.twitter.sdk.android.core.internal.oauth.OAuth1aService$1.failure(OAuth1aService.java:215)
at com.twitter.sdk.android.core.Callback.failure(Callback.java:45)
at retrofit.CallbackRunnable$2.run(CallbackRunnable.java:53)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5837)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1388)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1183)
Android Studio > Preferences > Server Certificates >没有任何Accepted Certificates。
如何添加证书？