Sounds like the identifier field is missing, and so the list grid can't display a suitable URL to click on.
to Administration > Module Builder
your dynamic module
on Backend screens tweaks link
on Add / remove columns in the table (grid) button for your type
- Drag an existing column to act as the new identifier field - typically title or something like that.
That should then give you something to 'click' on in the maintenance grid, so you can access the editor.