Is it a Bug? Syntax error ')' Expected keep appearing

Hi @ibnu.alem ,
I can not open your project

But I create a test project with similar your argument and variable type
and I have any error similar you
I have checked packages
image
image
and json file
You can create new project again
Check Argument.zip (26.8 KB)

Or you can copy your step to my project
hope it help,