error message on my start page
I have an error message on my start page and don't know how to fix it?
The error message:
Warning: Undefined variable $orderby in
/home/httpd/vhosts/kletterlehrerin.ch/httpdocs/wp-content/themes/catch-eve
rest-pro/inc/catcheverest-functions.php on line 957 Warning: Undefined
variable $catcheverest_category_sliders in
/home/httpd/vhosts/kletterlehrerin.ch/httpdocs/wp-content/themes/catch-eve
rest-pro/inc/catcheverest-functions.php on line 994