split screen showing up

-- url of the page with the problem -- : mywebsite.com/mypage
-- HikaShop version -- : bus. 2.2.2
-- Joomla version -- : 3.1-- PHP version -- : 5.3.24
-- Browser(s) name and version -- : Firefox, chrome, I.E

When my customers changes order on front through the hikamarket control panel from confirmed to shipped and then goes to email customer the screen appears like the attached image.

Hi,

You have a popup problem in HikaShop.
Please edit your HikaShop configuration to use "mootools" as the popup mode.
www.hikashop.com/support/documentation/5...html#display_general

Regards,