strange error debug message

[snpr25]

Folks i was trying to debug the mapgroup no show issue in my website
and just find another thing maybe nothint , but anyway. there it is

[23-Sep-2017 23:52:30 UTC] PHP Strict Standards: Declaration of Admin_Page_Framework_Walker_Category_Checklist::start_el() should be compatible with Walker_Category::start_el(&$output, $category, $depth = 0, $args = Array, $id = 0) in /home/infop843/public_html/vilazelia/wp-content/themes/jeo-dev/inc/admin/admin-page-framework.php on line 2599
[23-Sep-2017 23:52:31 UTC] PHP Notice: Undefined index: activated in /home/infop843/public_html/vilazelia/wp-content/themes/jeo-dev/functions.php on line 78