Description:

Since one of the last updates (3.9.3 / 3.10.0) we cannot remove users from channels / private groups anymore.
We use LDAP and sync accounts from ldap-groups to Channels but we can reproduce this error even on manually created private groups.

Steps to reproduce:

1. Create new private group with another person
2. Open "Members"
3. Click on other person
4. 3-Dot -> Remove from room

Expected behavior:

User gets removed

Actual behavior:

User doesn't get removed and:

Server Setup Information:

• Version of Rocket.Chat Server: 3.10.0
• Operating System: linux
• Deployment Method: docker
• Number of Running Instances: 1
• NodeJS Version: v12.18.4
• MongoDB Version: 4.0.20

Client Setup Information

• Desktop App or Browser Version: Everywhere
• Operating System: All