Error Deleting a Group Membership

I am also seeing an error when deleting a membership--this is
without my Grouper code.

If I do

GET /registry/co_group_members/delete/6/copersonid:3/co:2 HTTP/1.1

I get back a 302 with

Location: https://127.0.0.1/registry/co_groups/edit/co:2/tab:group

When my browser does a GET of that

GET /registry/co_groups/edit/co:2/tab:group HTTP/1.1

I see this:

Warning (2): Missing argument 1 for CoGroupsController::edit()
[APP/Controller/CoGroupsController.php, line 164]
Code

*/

function edit($id) {

CoGroupsController::edit() -
APP/Controller/CoGroupsController.php, line 164
ReflectionMethod::invokeArgs() - [internal], line ??
Controller::invokeAction() -
CORE/Cake/Controller/Controller.php, line 473
Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line
104
Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php,
line 86
[main] - APP/webroot/index.php, line 96

So the CoGroupsController has an edit function that is
expecting to get $id but it isn't being passed.