Fatal error: Uncaught TypeError: GetLanguageSubdirectoryFromLanguage(): Argument #1 ($language) must be of type string, null given, called in /var/www/html/php/classes/Link_Library.php on line 89 and defined in /var/www/html/php/functions.php:10225 Stack trace: #0 /var/www/html/php/classes/Link_Library.php(89): GetLanguageSubdirectoryFromLanguage() #1 /var/www/html/php/classes/Person.php(1451): Link_Library->set() #2 /var/www/html/schedule.php(27): Person->current_user_header() #3 /var/www/html/wp-content/plugins/xyz-wp-insert-code-snippet/shortcode-handler.php(224) : eval()'d code(2): require('...') #4 /var/www/html/wp-content/plugins/xyz-wp-insert-code-snippet/shortcode-handler.php(224): eval() #5 /var/www/html/wp-includes/shortcodes.php(434): xyz_ics_display_content() #6 [internal function]: do_shortcode_tag() #7 /var/www/html/wp-includes/shortcodes.php(273): preg_replace_callback() #8 /var/www/html/wp-includes/class-wp-hook.php(324): do_shortcode() #9 /var/www/html/wp-includes/plugin.php(205): WP_Hook->apply_filters() #10 /var/www/html/wp-includes/post-template.php(256): apply_filters() #11 /var/www/html/wp-content/themes/astra/template-parts/single/content-header.php(37): the_content() #12 /var/www/html/wp-includes/template.php(812): require('...') #13 /var/www/html/wp-includes/template.php(745): load_template() #14 /var/www/html/wp-includes/general-template.php(206): locate_template() #15 /var/www/html/wp-content/themes/astra/inc/template-parts.php(374): get_template_part() #16 /var/www/html/wp-includes/class-wp-hook.php(324): astra_entry_content_single_page_template() #17 /var/www/html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #18 /var/www/html/wp-includes/plugin.php(517): WP_Hook->do_action() #19 /var/www/html/wp-content/themes/astra/inc/core/theme-hooks.php(450): do_action() #20 /var/www/html/wp-content/themes/astra/template-parts/content-page.php(28): astra_entry_content_single_page() #21 /var/www/html/wp-includes/template.php(812): require('...') #22 /var/www/html/wp-includes/template.php(745): load_template() #23 /var/www/html/wp-includes/general-template.php(206): locate_template() #24 /var/www/html/wp-content/themes/astra/inc/class-astra-loop.php(110): get_template_part() #25 /var/www/html/wp-includes/class-wp-hook.php(324): Astra_Loop->template_parts_page() #26 /var/www/html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #27 /var/www/html/wp-includes/plugin.php(517): WP_Hook->do_action() #28 /var/www/html/wp-content/themes/astra/inc/class-astra-loop.php(198): do_action() #29 /var/www/html/wp-content/themes/astra/inc/class-astra-loop.php(175): Astra_Loop->loop_markup() #30 /var/www/html/wp-includes/class-wp-hook.php(324): Astra_Loop->loop_markup_page() #31 /var/www/html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #32 /var/www/html/wp-includes/plugin.php(517): WP_Hook->do_action() #33 /var/www/html/wp-content/themes/astra/inc/core/theme-hooks.php(265): do_action() #34 /var/www/html/wp-content/themes/astra/page.php(32): astra_content_page_loop() #35 /var/www/html/wp-includes/template-loader.php(106): include('...') #36 /var/www/html/wp-blog-header.php(19): require_once('...') #37 /var/www/html/index.php(17): require('...') #38 {main} thrown in /var/www/html/php/functions.php on line 10225