B4J Question B4J Chat

Hi all,
Subject: B4A-B4J chat example (B4J attached)
The Phone and PC are paired and connected through Bluetooth.
When tried to send something I get "Connection is broken" on the Android device,

and on the B4J PC the log file is:
java.lang.Exception: Sub astreams_newdata was not found.
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:97)
at anywheresoftware.b4a.BA$2.run(BA.java:229)
at com.sun.javafx.application.PlatformImpl.lambda$null$170(PlatformImpl.java:295)
at com.sun.javafx.application.PlatformImpl$$Lambda$48/1866176356.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$171(PlatformImpl.java:294)
at com.sun.javafx.application.PlatformImpl$$Lambda$47/1685538367.run(Unknown Source)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$145(WinApplication.java:101)
at com.sun.glass.ui.win.WinApplication$$Lambda$36/2058534881.run(Unknown Source)
at java.lang.Thread.run(Thread.java:745)

Any meaning?