New Mipad 3 | Miui 8.3 - 7.5.25 | I Can Not Change From Dhcp To Static

[cabaseira]

I can not change the WI-FI connection from 'DHCP' to 'Static'. When I try to change to 'Static', I do not see the list to select it, instead a gray box appears in the upper left (I send a picture).
The same thing happens when I try to change 'Proxy'.