To use the 'Remove channel members' option under Trigger actions while creating a Deal Room trigger, you would need to make a change on your Slack permissions for this to work.
Please follow the steps below in order to make the change:
Under your Slack workspace name, go to Workspace Settings.
Head over to the 'Manage Permissions' tab on the left menu navigation.
Head over to the 'Account Types' section.
Edit the permission for the 'Remove users from private channels' to enable the same for Members as well. That's it!
