Chat - "The Moderator has closed this chat session"

I installed the chat plugin and initially, the plugin never worked.

- When I type in the user input, then press 'Enter', nothing happens.
- Between the chat display and user input, "The Moderator has closed this chat session" shows.
- There are two buttons below the user input: "Close Chat" and "Clear". If I click "Close Chat", nothing happens, but if I refresh, the button changes to "Open Chat" yet the problem persists. If I ten click "Open Chat", it toggles back to "Close Chat" and the problem continues. If I click "Clear", it loads then refreshes the page so I am assuming it would work.

I am the administrator of the website.
I am using the shortcode: [chat id="5" ] to enable chat on a specific page.