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Attempt to invoke virtual method 'android.content.SharedPreferences android.content.Context.getSharedPreferences(java.lang.String, int)' on a null object reference
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Attempt to invoke virtual method 'android.content.SharedPreferences android.content.Context.getSharedPreferences(java.lang.String, int)' on a null object reference
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Attempt to invoke virtual method 'android.content.SharedPreferences android.content.Context.getSharedPreferences(java.lang.String, int)' on a null object reference
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Attempt to invoke virtual method 'android.content.SharedPreferences android.content.Context.getSharedPreferences(java.lang.String, int)' on a null object reference
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Attempt to invoke virtual method 'android.content.SharedPreferences android.content.Context.getSharedPreferences(java.lang.String, int)' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.SharedPreferences android.content.Context.getSharedPreferences(java.lang.String, int)' on a null object reference	at android.content.ContextWrapper.getSharedPreferences(ContextWrapper.java:171)	at zupportdesk.desk.zupport.chatsystem.Services.SignalRService.select_Visitor(SignalRService.java:106)	at zupportdesk.desk.zupport.chatsystem.ChatsTab.incomming_item_clicked(ChatsTab.java:97)	at zupportdesk.desk.zupport.chatsystem.Data.IncommingChatsViewHolders.onClick(IncommingChatsViewHolders.java:54)	at android.view.View.performClick(View.java:5204)	at android.view.View$PerformClick.run(View.java:21155)	at android.os.Handler.handleCallback(Handler.java:739)	at android.os.Handler.dispatchMessage(Handler.java:95)	at android.os.Looper.loop(Looper.java:148)	at android.app.ActivityThread.main(ActivityThread.java:5422)	at java.lang.reflect.Method.invoke(Native Method)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)