Fatal error: Uncaught TypeError: in_array(): Argument #2 ($haystack) must be of type array, string given in /home/klient.dhosting.pl/cwksresovia/cwks-resovia.pl/public_html/wp-content/themes/cwks-resovia/functions.php:319 Stack trace: #0 /home/klient.dhosting.pl/cwksresovia/cwks-resovia.pl/public_html/wp-content/themes/cwks-resovia/functions.php(319): in_array('menu-header', '') #1 /home/klient.dhosting.pl/cwksresovia/cwks-resovia.pl/public_html/wp-includes/class-wp-hook.php(324): {closure}('<a aria-label="...', Object(WP_Post), 0, Array) #2 /home/klient.dhosting.pl/cwksresovia/cwks-resovia.pl/public_html/wp-includes/plugin.php(205): WP_Hook->apply_filters('<a aria-label="...', Array) #3 /home/klient.dhosting.pl/cwksresovia/cwks-resovia.pl/public_html/wp-content/themes/cwks-resovia/inc/nav-walker.php(36): apply_filters('walker_nav_menu...', '<a aria-label="...', Object(WP_Post), 0, Array) #4 /home/klient.dhosting.pl/cwksresovia/cwks-resovia.pl/public_html/wp-includes/class-wp-walker.php(150): CWKS_Resovia_Mobile_Menu_Walker->start_el('<li class="menu...', Object(WP_Post), 0, Array, 0) #5 /home/klient.dhosting.pl/cwksresovia/cwks-resovia.pl/public_html/wp-includes/class-wp-walker.php(252): Walker->display_element(Object(WP_Post), Array, 0, 0, Array, '<li class="menu...') #6 /home/klient.dhosting.pl/cwksresovia/cwks-resovia.pl/public_html/wp-includes/post-template.php(1578): Walker->walk(Array, 0, Array, 0) #7 /home/klient.dhosting.pl/cwksresovia/cwks-resovia.pl/public_html/wp-includes/post-template.php(1361): walk_page_tree(Array, 0, 0, Array) #8 /home/klient.dhosting.pl/cwksresovia/cwks-resovia.pl/public_html/wp-includes/post-template.php(1493): wp_list_pages(Array) #9 /home/klient.dhosting.pl/cwksresovia/cwks-resovia.pl/public_html/wp-includes/nav-menu-template.php(169): wp_page_menu(Array) #10 /home/klient.dhosting.pl/cwksresovia/cwks-resovia.pl/public_html/wp-content/themes/cwks-resovia/header/header-mobile.php(80): wp_nav_menu(Object(stdClass)) #11 /home/klient.dhosting.pl/cwksresovia/cwks-resovia.pl/public_html/wp-includes/template.php(812): require('/home/klient.dh...') #12 /home/klient.dhosting.pl/cwksresovia/cwks-resovia.pl/public_html/wp-includes/template.php(745): load_template('/home/klient.dh...', false, Array) #13 /home/klient.dhosting.pl/cwksresovia/cwks-resovia.pl/public_html/wp-includes/general-template.php(206): locate_template(Array, true, false, Array) #14 /home/klient.dhosting.pl/cwksresovia/cwks-resovia.pl/public_html/wp-content/themes/cwks-resovia/header.php(48): get_template_part('header/header-m...') #15 /home/klient.dhosting.pl/cwksresovia/cwks-resovia.pl/public_html/wp-includes/template.php(810): require_once('/home/klient.dh...') #16 /home/klient.dhosting.pl/cwksresovia/cwks-resovia.pl/public_html/wp-includes/template.php(745): load_template('/home/klient.dh...', true, Array) #17 /home/klient.dhosting.pl/cwksresovia/cwks-resovia.pl/public_html/wp-includes/general-template.php(48): locate_template(Array, true, true, Array) #18 /home/klient.dhosting.pl/cwksresovia/cwks-resovia.pl/public_html/wp-content/themes/cwks-resovia/single.php(9): get_header() #19 /home/klient.dhosting.pl/cwksresovia/cwks-resovia.pl/public_html/wp-includes/template-loader.php(106): include('/home/klient.dh...') #20 /home/klient.dhosting.pl/cwksresovia/cwks-resovia.pl/public_html/wp-blog-header.php(19): require_once('/home/klient.dh...') #21 /home/klient.dhosting.pl/cwksresovia/cwks-resovia.pl/public_html/index.php(17): require('/home/klient.dh...') #22 {main} thrown in /home/klient.dhosting.pl/cwksresovia/cwks-resovia.pl/public_html/wp-content/themes/cwks-resovia/functions.php on line 319