Utopian.io - Contribution - Report Post Not Working

Prerequisite: Login as User

Steps:

1. Go https://utopian.io/
2. Click On Any Contribution/Post
3. Click On Three Vertical Dot On Top Right of Post/Contribution
4. Click "Report post"
5. Observe

Expected Result : Pop Up Message Box for Report a Post.

Actual Result: Nothing happen after "Report post".

Environment: Windows 8.1 Firefox & Chrome