Unable to add label to crawl configuration of datastore

(from github.com/seki19)
I want to add a label for crawling a data store, but the form for adding a label is not displayed on the crawl setting screen.

I have created two labels.

fess 13.1

(from github.com/marevol)
Label is label field.
You can put label=["aaa", "bbb", "ccc"] to Script.

(from github.com/seki19)
Thank you for your response!