Yes, you can activate an archived task. To do that –

1. First locate the archived tasks by clicking on the briefcase icon present below the “+ Add task” button.

2. This will display all the archived tasks.

3. Now click on the 3-dots icon on the task and select the Active option from the menu.

4. A popup menu will open to reconfirm your action.

5. Click on Active button to activate the task.

6. Again click on the briefcase icon to go back to the active tasks.