Uncaught RangeError: Offset is outside the bounds of the DataView at DataView.getUint32 (<anonymous>)

I tested with the example of tree_test.html.

An error of "Uncaught RangeError" occurred when subsribing to any parameter for the first time.

But when I modified tree_test.html to subsribe to other parameters (still the same error), then restored tree_test.html to subsribe to the parameter tested before, it`s ok except the last tested one.