can't run directly on Gitbook

[mzahana]

I m using the built-in Gitbook editor, to edit my book. So, I don't have a local copy. I would like to use the copy-button. So, I wen tot he plugins and added the copy-code-button plugin from the plugin store. The 'copy' button appears on the code sections. However, when I click it, it gives 'unable to copy'.
Why is that?

[freakynit]

@mzahana : Which browser and browser version you are using?

[mzahana]

Safari v9.1

copy-code-button plugin using in my sunlight syntax heighliter but it shows dobule copy button uppear on the code block.

how can i fix it?