Next Talk Messages Not Displaying to Remote User

I’m new to NextCloud, but got it installed on an Ubuntu 18.04 web server. General NextCloud works fine, and I activated the Talk app, but when I try to start a chat with another user, the message doesn’t seem to go through to the remote user (really me just logged in as 2 users in different browsers on the same computer). Is there any other configuration that needs to be done besides enabling the app?

I can see both users are online and if I change the status of one users, it updates in the contact list of the remote user. Just no messages going through.