Hi @kazurayam , I read your post and try downloading your demo and run the demo on local, but it keeps getting this error message everytime it gets to step executeJavaScript().
My demo used the old Katalon Forum page as the testbed. My previous post is dated Nov 2021, 15 months ago. Since then, the Katalon User Forum page has changed its design. So my demo does not work any longer. I hope you can learn the necessary programming technique out of the sample code.