What happened?
It’s not possible to report a player for at least several days. Button “Submit” doesn’t work.
What was SUPPOSED to happen?
Steps to reproduce:
After game ends in final menu click “Report Player” and then try to press “Submit” button.
At a guess, your report descriptions might be too short. The game won’t let you submit a report unless the description is (if I remember correctly) 15 characters or longer.
As Ashe says, you need to write a sentence on why you report him.