return error in hikashop configuration page

-- HikaShop version -- : 4
-- Joomla version -- : 3.9.2
-- PHP version -- : 7.2
-- Browser(s) name and version -- : chrome
-- Error-message(debug-mod must be tuned on) -- : Notice: Undefined variable: compareFilters in /home/*******/domains/********/public_html/administrator/components/com_hikashop/classes/widget.php on line 710

Notice: Undefined variable: compareFilters in /home/***********/domains/**********/public_html/administrator/components/com_hikashop/classes/widget.php on line 710

Warning: implode(): Invalid arguments passed in /home/*************/domains/******************/public_html/administrator/components/com_hikashop/classes/widget.php on line 711

Notice: Undefined variable: compareFilters in /home/*********/domains/*******/public_html/administrator/components/com_hikashop/classes/widget.php on line 710

Notice: Undefined variable: compareFilters in /home/**********/domains/**********/public_html/administrator/components/com_hikashop/classes/widget.php on line 710

Warning: implode(): Invalid arguments passed in /home/********/domains/********/public_html/administrator/components/com_hikashop/classes/widget.php on line 711

hi
i do some little edit in registration page and i get this error

Hello,

Which exact HikaShop version number are you using ?
www.hikashop.com/support/documentation/5...ashop-changelog.html

Because it looks like these little warning already been reported and fixed in the latest version :
www.hikashop.com/forum/5-support-en-fran...e-a-jour.html#300648

Regards,