(0)
I've deleted build folder....
I did not understand...
(1)
But, when I use the form in my project it's doesn't work.
You cant copy and paste a "unit" to your project...
You need "Use/Import LAMW Stuff..." from menu "Tools" --->"[LAMW] ....."
how does it work? The [dummy] unit[form] selected
will be replaced by the the imported unit[form]!
(2)
Also, I have one more bug. The main form changed every I create a new jForm, so it requires me to edit the .LPI file manually.
The error (1) can cause the error (2)!!!
But, to create new form you need use "File" --> "New..." --> "LAMW [GUI] Android jForm"
[the default will be "Recyclable", so change to "Easel" if you need....]