Dynamics title

Hi guys,

A little bit help needed. So I created this measure :

Selected year = SELECTEDVALUE(Dates[Year], "all years")

And I want to to use as a title in my card visual. So In its property, go to Title and click the formula button :

Choose Format by "Field value" then choose my measure ->

But the measure cannot be selected. It stay there with the dropdown and I cannot click OK button.

Anything that I missed ?

Thanks