An Assignment Task has evidence accepted, and the module has been set to tutor decides. But the “Complete” button is not available for the learner. Why is this?
This can happen if the “Don’t create a task” box is ticked. Ticking this box means the component will not create a task automatically. However as the component is an Assignment (Task), it requires a task to be completed.
In Classic, you will need to create a Task for the component.
You should then be able to click on "Mark as Complete" to complete the component.