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Attempt to invoke virtual method 'android.database.Cursor android.database.sqlite.SQLiteDatabase.query(java.lang.String, java.lang.String[], java.lang.String, java.lang.String[], java.lang.String, java.lang.String, java.lang.String, java.lang.String)' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'android.database.Cursor android.database.sqlite.SQLiteDatabase.query(java.lang.String, java.lang.String[], java.lang.String, java.lang.String[], java.lang.String, java.lang.String, java.lang.String, java.lang.String)' on a null object reference	at com.amplitude.api.DatabaseHelper.queryDb(DatabaseHelper.java:395)	at com.amplitude.api.DatabaseHelper.getValueFromTable(DatabaseHelper.java:209)	at com.amplitude.api.DatabaseHelper.getValue(DatabaseHelper.java:197)	at com.amplitude.api.AmplitudeClient.upgradeSharedPrefsToDB(AmplitudeClient.java:2098)	at com.amplitude.api.AmplitudeClient.upgradeSharedPrefsToDB(AmplitudeClient.java:2081)	at com.amplitude.api.AmplitudeClient$1.run(AmplitudeClient.java:241)	at android.os.Handler.handleCallback(Handler.java:739)	at android.os.Handler.dispatchMessage(Handler.java:95)	at android.os.Looper.loop(Looper.java:135)	at android.os.HandlerThread.run(HandlerThread.java:61)