I can not find Manage Assignments in Permission Sets. There is just no such button.
Why would I expect the Manage Assignments be there? Because it is told on Trailhead that it is there:
Use the Quick Find box to find Permission Sets in Setup.
Click Clone next to the set you want to copy.
Enter a label and a description.
Click Save to go back to the permission set overview page.
In the permission set toolbar, click Manage Assignments, then click Add Assignments.
What am I doing wrong here? Why don`t I see the Manage Assignments button?