Classes/menu.php bug everywhere

-- HikaShop version -- : 3.1.1
-- Joomla version -- : 3.7.4
-- PHP version -- : 5.6.30
-- Error-message(debug-mod must be tuned on) -- : /administrator/components/com_hikashop/classes/menus.php

Hello,

I updated from 3.0.0 to 3.1.1 and i get this message everywhere

Notice: Undefined variable: task in /home/challengqx/www/administrator/components/com_hikashop/classes/menus.php on line 210

I have no idea what to do. Can you help me please. Plus, i updated because Jerome told me that it would fix my responsive problem but website still is not responsive. i only have hikashop module installed so it does not come from any other module. Can you please help me, the website will be mainly consulted on mobile so i would really really like it to be responsive, for the image to fit well and for it not to have this huge space on the right side. Thanks a lot guys.

Hello,

A PHP warning is not a bug, it is just a warning.
And such kind of PHP message should be not visible in a production website ; they can be logged in a file but not displayed to the final user.

Afterwards, I'm sorry but I don't understand the link between the subject of your topic and the reste of your message.

Regards,

thanks, after searching otherforum i understood that i had set the error display to develpoment. setted it to defaults and message is gone. Thanks