Thanks Erel, I commented out the 'CreateResourceFromFile(Macro, Core.NetworkClearText)' line in the manifest editor and downloaded to a different cellphone (galaxy S6). On opening the app the following error was logged.
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.Integer.intValue()' on a null object reference
at anywheresoftware.b4a.objects.drawable.ColorDrawable.build(ColorDrawable.java:65)
However, the app worked, so thank you very much for your help.
How important is the NetworkClearText statement?