"Report to admin" option does not work

When hitting the up-right button of a post in a Facebook group, a menu pops up with options like:

• Find Support or Report Post
• Save post
• Report to admin -Turn on/off notifications for this post When "Find Support or Report Post" or "Report to admin" is toucted, there should be another menu about the matters to report.

"Find Support or Report Post" works in Face Slim, but "Report to admin" button does nothing after being touched.