Can't debug in Katalon

Hi all,
I’m facing an error when I debug my script.
The first error is “Source not found”. I added the corresponding jar file like screenshot below:

And after debugging again, I’m facing an error:

Can anybody help me?
Btw, I imported jar file external library.

Thank you so much!

9-5-2018 11-14-50 AM.png

9-5-2018 11-12-30 AM.png