Can't add new users with both user and livechat-agent role

[franckadil]

Description:

Can't create new users whn selcting live-chat-agent role. The submission form doeans't process users creation.
But can create normal user with the "user" role instead.

Steps to reproduce:

1. Go to Administration
2. Click on Users
3. and so on Add User with livechat-agent role and user role.

Expected behavior:

Creating new users.

Actual behavior:

Server Setup Information:

Version	2.1.0
Apps Engine 1.6.0
Database Migration 161
Commit:
Hash: c95663d
Date: Fri Sep 27 20:47:47 2019 -0300
Branch: Head
Subject: Merge pull request #15459 from RocketChat/release-2.1.0
Tag: 2.1.0
Author: Diego Sampaio

Additional context

Relevant logs:

[renatobecker-zz]

@franckadil Can you, please, check your log in both browser and server-side when you attempt to create the user?

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.