when login as a user/administrator, "OK/cancel" button missing from system popup, but when using as developer mode, they appear.
odoo version 12 community edition,
tried fresh install on win7 win10 same result with same result.
Screenshot:
As developer mode: https://drive.google.com/file/d/1i5I-texjaPFySvyBKu_kAtX25kjZYgTt/view?usp=sharing
normal mode: https://drive.google.com/file/d/1z-Edb223BCEtClTUELBQUPd81Hwyog4V/view?usp=sharing
try again after clear browser cache