Elasticsearch does not show the exception message?

In my computer, when i run elasticsearch server, and running an invalid query on web page via http://localhost:9200/_plugin/head, it thrown an exception message on web page and console.
But when i run that elasticsearch server on my laptop, also running an invalid query on web page, it did throw exception message on console, but it didn't on web page.

I don't know why i get this trouble. Does any one know this ?