Jenkins publish over ssh can not recognize user inputs

I am trying to deploy a spring-boot - gradle project via Jenkins.

I put all arguments as Push over SSH Guide said, But somehow Jenkins did not recognize user inputs like screen shot below.

What would I do to fix this?

That red phrase is nothing but just a notice.

• Source files : file to send over SSH(In my case, the output file of spring boot)
• Remote prefix : directory where Source files are in jenkins workspace
• Remote directory : The directory to execute ssh command in target server
• Exec command : command to execute (pwd or ls -al is good to test)

I hope this summary can save time of others