IncompatibleClassChangeError BasicHttpResponse

[Virthuss]

Hi. Some users get this error from my app when I'm using proguard. Its not happening on all the devices, but for some of them.

java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:304)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
Caused by: java.lang.IncompatibleClassChangeError: Class 'org.apache.http.message.BasicHttpResponse' does not implement interface 'b.a.b.i' in call to 'b.a.b.d b.a.b.i.c()' (declaration of 'java.lang.reflect.ArtMethod' appears in /system/framework/core-libart.jar)
at com.uservoice.uservoicesdk.a.c.a(Unknown Source)
at com.uservoice.uservoicesdk.a.c.doInBackground(Unknown Source)
at android.os.AsyncTask$2.call(AsyncTask.java:292)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
            at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
            at java.lang.Thread.run(Thread.java:818)