RemoveUserFromRole not working from a Velocity Script

Only the administrators will have the permissions to remove a member from a role. If you are trying to execute the code in a normal context this won't work. 

If your community is on 11.X you can create automation by using the manual trigger option.

Thanks. I created the following automation, but it is not removing the user when I trigger it from my widget:

#set($userId = $core_v2_utility.ParseInt($context_v2_automationTrigger.Arguments.Parameters.Value('UserId')))
#set($roleId = $core_v2_utility.ParseInt($context_v2_automationTrigger.Arguments.Parameters.Value('RoleId')))
$core_v2_roleUsers.RemoveUserFromRole($roleId, "%{ UserId = $userId }")

Code for triggering the automation:

 $core_v2_automation.Execute($core_v2_utility.ParseGuid('86a03571-49a9-46b5-95d7-f6e287b9a548'), "%{ RoleId = '$roleId', UserId = '$user.Id' }")

Can you please make sure 

1) Execute as the service account should be checked

2) Whether automation is enabled or not. (Administration >  Automation > Automations > Click add and configure .

It works now. Thanks.

It works now. Thanks.