Can't open Advanced Rename Window

I've been trying to open the Advanced Rename Window, but no success so far.

When I select the files I wish to rename and click the Rename button on the toolbar, a small windows opens and it says (in brazilian portuguese) "specify another name or type a model".

Thanks in advance for any help.

The toggle is here:

image

1 Like

Thank you so much!
Regards,

Ulisses.