Android Question Error compiling DownloadService

Sub Service_Create
    HC.Initialize("HC")
    Notification1.Initialize
    Notification1.Icon = "icon" 'use the application icon file for the notification
    Notification1.Vibrate = False
End Sub

B4A version 4.30
Parsing code. 0.01
Compiling code. 0.04
Compiling layouts code. 0.02
Generating R file. 0.08
Compiling generated Java code. Error
B4A line: 20
HC.Initialize(\
javac 1.8.0_60
src\anywheresoftware\b4a\samples\downloadservice\downloadservice.java:191: error: cannot access ClientProtocolException
_hc.Initialize("HC");
^
class file for org.apache.http.client.ClientProtocolException not found

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