我使用广告表单库（2.13.3）。 但是应用仅在Android 9上出现此崩溃：
Caused by java.lang.ClassNotFoundException: Didn't find class
"org.apache.http.entity.StringEntity" on path: DexPathList[[zip file "/data/app/com.trondheim.android-tV2q1JK3wt2VDvQ_3neong==/base.apk"],nativeLibraryDirectories=[/data/app/com.trondheim.android-tV2q1JK3wt2VDvQ_3neong==/lib/arm64, /system/lib64]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:169)
at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
at com.adform.sdk.network.network.NetworkTask.setJsonEntity(NetworkTask.java:577)
at com.adform.sdk.services.AdRefreshService.doBeforeExecution(AdRefreshService.java:123)
at com.adform.sdk.entities.ObservableService$1.run(ObservableService.java:130)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6863)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:537)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
请帮助我解决此问题。