org.json.JSONException: No value for content-type
     at org.json.JSONObject.get(JSONObject.java:389)
     at org.json.JSONObject.getString(JSONObject.java:550)
     at dji.upgrade.internal.csdk.commonadapter.network.nhf.onResponse()
     at dji.thirdparty.okhttp3.RealCall$AsyncCall.execute()
     at dji.thirdparty.okhttp3.internal.NamedRunnable.run()
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
     at java.lang.Thread.run(Thread.java:761)