Why I can not reply to my customers` reviews?

Hi, recently I found that I can not reply the review of my customers, when I click the reply button , it reports the 500 error.

How should I do?

There’s a problem with the current state, the website is totally down now. If the issue persists, like after 24 hours, contact support and report the bug

Envato is working on that issue. Many people are facing this problem. See the updated status here: http://status.envato.com/