Hi everyone,
A few weeks ago when I first started with Google Apps Script, I'm sure that "Install" button is not appeared when I tested a new addon (there are only 3 items: Configure notifications, About and Help)

But now whenever I code a new addon and try to test it, the "Install" button appears, and when I click it, nothing happens. It's not a good UX for users and I want to remove it.
Thank you very much.