Fatal error: Uncaught TypeError: property_exists(): Argument #1 ($object_or_class) must be of type object|string, bool given in /usr/home/mw2p79qdlg/www/htdocs/reconect/wp/wp-content/themes/rcnt/functions/f-custom.php:81 Stack trace: #0 /usr/home/mw2p79qdlg/www/htdocs/reconect/wp/wp-content/themes/rcnt/functions/f-custom.php(81): property_exists(false, 'slug') #1 /usr/home/mw2p79qdlg/www/htdocs/reconect/wp/wp-includes/class-wp-hook.php(303): change_posts_per_page(Object(WP_Query)) #2 /usr/home/mw2p79qdlg/www/htdocs/reconect/wp/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters(Object(WP_Query), Array) #3 /usr/home/mw2p79qdlg/www/htdocs/reconect/wp/wp-includes/plugin.php(518): WP_Hook->do_action(Array) #4 /usr/home/mw2p79qdlg/www/htdocs/reconect/wp/wp-includes/class-wp-query.php(1784): do_action_ref_array('pre_get_posts', Array) #5 /usr/home/mw2p79qdlg/www/htdocs/reconect/wp/wp-includes/class-wp-query.php(3465): WP_Query->get_posts() #6 /usr/home/mw2p79qdlg/www/htdocs/reconect/wp/wp-includes/class-wp.php(629): WP_Query->query(Array) #7 /usr/home/mw2p79qdlg/www/htdocs/reconect/wp/wp-includes/class-wp.php(752): WP->query_posts() #8 /usr/home/mw2p79qdlg/www/htdocs/reconect/wp/wp-includes/functions.php(1291): WP->main('') #9 /usr/home/mw2p79qdlg/www/htdocs/reconect/wp/wp-blog-header.php(16): wp() #10 /usr/home/mw2p79qdlg/www/htdocs/index.php(17): require('/usr/home/mw2p7...') #11 {main} thrown in /usr/home/mw2p79qdlg/www/htdocs/reconect/wp/wp-content/themes/rcnt/functions/f-custom.php on line 81