Fatal error: Uncaught TypeError: date(): Argument #2 ($timestamp) must be of type ?int, string given in /home/klient.dhosting.pl/slaska3/strony_www/ir/www/wp-content/plugins/event-calendar-wd/ecwd_class.php:501 Stack trace: #0 /home/klient.dhosting.pl/slaska3/strony_www/ir/www/wp-content/plugins/event-calendar-wd/ecwd_class.php(501): date('Y-m-d', '2018-04-13') #1 /home/klient.dhosting.pl/slaska3/strony_www/ir/www/wp-content/plugins/event-calendar-wd/includes/calendar-class.php(1406): ECWD::ecwd_date('Y-m-d', '2018-04-13') #2 /home/klient.dhosting.pl/slaska3/strony_www/ir/www/wp-content/plugins/event-calendar-wd/includes/calendar-class.php(394): Calendar->set_json_ld(Array, 'list') #3 /home/klient.dhosting.pl/slaska3/strony_www/ir/www/wp-content/plugins/event-calendar-wd/includes/ecwd-display-class.php(1288): Calendar->showcal() #4 /home/klient.dhosting.pl/slaska3/strony_www/ir/www/wp-content/plugins/event-calendar-wd/includes/ecwd-functions.php(102): ECWD_Display->get_view('', 'full', false, Array, false) #5 /home/klient.dhosting.pl/slaska3/strony_www/ir/www/wp-content/plugins/event-calendar-wd/includes/ecwd-shortcodes.php(72): ecwd_print_calendar(Array, 'full', Array) #6 /home/klient.dhosting.pl/slaska3/strony_www/ir/www/wp-includes/shortcodes.php(381): ecwd_shortcode(Array, '', 'ecwd') #7 [internal function]: do_shortcode_tag(Array) #8 /home/klient.dhosting.pl/slaska3/strony_www/ir/www/wp-includes/shortcodes.php(256): preg_replace_callback('/\\[(\\[?)(ecwd)(...', 'do_shortcode_ta...', '[ecwd id="4751"...') #9 /home/klient.dhosting.pl/slaska3/strony_www/ir/www/wp-includes/class-wp-hook.php(287): do_shortcode('[ecwd id="4751"...') #10 /home/klient.dhosting.pl/slaska3/strony_www/ir/www/wp-includes/plugin.php(212): WP_Hook->apply_filters('[ecwd id="4751"...', Array) #11 /home/klient.dhosting.pl/slaska3/strony_www/ir/www/wp-includes/post-template.php(253): apply_filters('the_content', '[ecwd id="4751"...') #12 /home/klient.dhosting.pl/slaska3/strony_www/ir/www/wp-content/themes/hueman/tmpl/single-tmpl.php(36): the_content() #13 /home/klient.dhosting.pl/slaska3/strony_www/ir/www/wp-includes/template.php(732): require('/home/klient.dh...') #14 /home/klient.dhosting.pl/slaska3/strony_www/ir/www/wp-includes/template.php(676): load_template('/home/klient.dh...', false, Array) #15 /home/klient.dhosting.pl/slaska3/strony_www/ir/www/wp-includes/general-template.php(204): locate_template(Array, true, false, Array) #16 /home/klient.dhosting.pl/slaska3/strony_www/ir/www/wp-content/themes/hueman/functions/init-front.php(1738): get_template_part('tmpl/single-tmp...') #17 /home/klient.dhosting.pl/slaska3/strony_www/ir/www/wp-content/themes/hueman/functions/init-front.php(27): hu_get_template_part('tmpl/single-tmp...') #18 /home/klient.dhosting.pl/slaska3/strony_www/ir/www/wp-content/themes/hueman/single.php(3): hu_get_content('tmpl/single-tmp...') #19 /home/klient.dhosting.pl/slaska3/strony_www/ir/www/wp-includes/template-loader.php(106): include('/home/klient.dh...') #20 /home/klient.dhosting.pl/slaska3/strony_www/ir/www/wp-blog-header.php(19): require_once('/home/klient.dh...') #21 /home/klient.dhosting.pl/slaska3/strony_www/ir/www/index.php(17): require('/home/klient.dh...') #22 {main} thrown in /home/klient.dhosting.pl/slaska3/strony_www/ir/www/wp-content/plugins/event-calendar-wd/ecwd_class.php on line 501