dir alias is not working for me

[plato2021]

Am I making a mistake?
I would like my directory "footprint" to show as "Small Footprint for Old Computers".
It shows footprint (no syntax errors).

Am I doing something wrong here?

The code below is in the section of "menu_alias"

Code:

        {
            "dir":"/footprint/",
            "alias":"Small Footprint for Old Computers"
         },