Fatal error: Uncaught TypeError: WP_Translation_Controller::set_locale(): Argument #1 ($locale) must be of type string, null given, called in /html/svt_apac_relaunch/wp-includes/l10n.php on line 803 and defined in /html/svt_apac_relaunch/wp-includes/l10n/class-wp-translation-controller.php:87 Stack trace: #0 /html/svt_apac_relaunch/wp-includes/l10n.php(803): WP_Translation_Controller->set_locale(NULL) #1 /html/svt_apac_relaunch/wp-includes/l10n.php(959): load_textdomain('default', '/html/svt_apac_...', NULL) #2 /html/svt_apac_relaunch/wp-content/plugins/polylang/src/olt-manager.php(75): load_default_textdomain(NULL) #3 /html/svt_apac_relaunch/wp-includes/class-wp-hook.php(326): PLL_OLT_Manager->load_textdomains('deutsch') #4 /html/svt_apac_relaunch/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #5 /html/svt_apac_relaunch/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #6 /html/svt_apac_relaunch/wp-content/plugins/polylang/src/frontend/choose-lang.php(128): do_action('pll_language_de...', 'deutsch', Object(PLL_Language)) #7 /html/svt_apac_relaunch/wp-content/plugins/polylang/src/frontend/choose-lang-url.php(34): PLL_Choose_Lang->set_language() #8 /html/svt_apac_relaunch/wp-content/plugins/polylang/src/frontend/frontend.php(134): PLL_Choose_Lang_Url->init() #9 /html/svt_apac_relaunch/wp-content/plugins/polylang/src/class-polylang.php(280): PLL_Frontend->init() #10 /html/svt_apac_relaunch/wp-content/plugins/polylang/src/class-polylang.php(224): Polylang->init_context('PLL_Frontend', Object(PLL_Model)) #11 /html/svt_apac_relaunch/wp-includes/class-wp-hook.php(324): Polylang->init('') #12 /html/svt_apac_relaunch/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #13 /html/svt_apac_relaunch/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #14 /html/svt_apac_relaunch/wp-settings.php(555): do_action('plugins_loaded') #15 /html/svt_apac_relaunch/wp-config.php(184): require_once('/html/svt_apac_...') #16 /html/svt_apac_relaunch/wp-load.php(50): require_once('/html/svt_apac_...') #17 /html/svt_apac_relaunch/wp-blog-header.php(13): require_once('/html/svt_apac_...') #18 /html/svt_apac_relaunch/index.php(17): require('/html/svt_apac_...') #19 {main} thrown in /html/svt_apac_relaunch/wp-includes/l10n/class-wp-translation-controller.php on line 87

Fatal error: Uncaught TypeError: WP_Translation_Controller::set_locale(): Argument #1 ($locale) must be of type string, null given, called in /html/svt_apac_relaunch/wp-includes/l10n.php on line 803 and defined in /html/svt_apac_relaunch/wp-includes/l10n/class-wp-translation-controller.php:87 Stack trace: #0 /html/svt_apac_relaunch/wp-includes/l10n.php(803): WP_Translation_Controller->set_locale(NULL) #1 /html/svt_apac_relaunch/wp-includes/l10n.php(959): load_textdomain('default', '/html/svt_apac_...', NULL) #2 /html/svt_apac_relaunch/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain() #3 [internal function]: WP_Fatal_Error_Handler->handle() #4 {main} thrown in /html/svt_apac_relaunch/wp-includes/l10n/class-wp-translation-controller.php on line 87