B4J Question Error during LoadLayout (java.lang.ArrayIndexOutOfBoundsException: arraycopy: length -4 is negative)

Private Sub B4XPage_Created (Root1 As B4XView)
    Root = Root1
    dd.Initialize
    'The designer script calls the DDD class. A new class instance will be created if needed.
    'In this case we want to create it ourselves as we want to access it in our code.
    xui.RegisterDesignerClass(dd)
    Root.LoadLayout("MainPage")    'error - at this point

Waiting for debugger to connect...
Program started.

java.lang.ArrayIndexOutOfBoundsException: arraycopy: length -4 is negative
at java.base/java.lang.System.arraycopy(Native Method)
at anywheresoftware.b4a.keywords.Bit.ArrayCopy(Bit.java:192)
at b4j.example.bitmapcreator._fillhorizontalline(bitmapcreator.java:4370)
at b4j.example.bitmapcreator._drawrect2(bitmapcreator.java:2583)
at b4j.example.bitmapcreator._drawrectrounded2(bitmapcreator.java:2686)
at b4j.example.bitmapcreator._drawcanvasasync(bitmapcreator.java:1663)
at b4j.example.bitmapcreator$1.run(bitmapcreator.java:5075)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)

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