Android Question an Error when using SMMrichEditor Library

[Oliver Simith]

Hello, everyone. my IDE reported an error while running my code, using SMMrichEditor. I am using the V0.05 SMMrichEditor files and have copied files to the asset folder before running the code.

The error information is like this:

My code is very simple:d

...
sub Activity_Create
    activity.loadLayout("LayoutNotes")  'the layout where I added a SMMrichEditor view in the designer. The error occurred at this line
    setNotingArea      'A sub that I created that was empty when the error occurred.
end sub

private sub setNotingArea
...                        '  I hadn't code in here
end sub

I am very new to programming. Not sure about the problem. Thank you very much for leaving any thoughts that will be helpful.