Cura 4.1 Ultimaker 2E+ Material Activate Button Missing

[alibayraktar 0]

When I try to change material on cura 4.1.0, I can't change it. The activate button can't be clicked on. It is not enabled material I try other materials. But it works on Ultimaker 3

 

On the older version (3.5.0), I could change the material on home screen but on cura 4.1.0 it's doesn't exist on home screen also It can't be changed on "Preferences"

 

I tried to find the cura appdata files and tried to change it but it didn't work or I changed wrong things.