If you're having trouble sending a message to a user, please ensure you have enough credits in your balance.
Keep in mind:
- Chat function is only available when the user you want to chat with is online.
- You can send a mail message to the user even if they're offline, and they'll see it once they're back online.
- If you still want to send a chat message while the user is offline, make sure you've chatted with them before. Otherwise, you won't be able to send a chat message while they're offline.