Fatal error: Uncaught TypeError: WP_Translation_Controller::set_locale(): Argument #1 ($locale) must be of type string, null given, called in /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-includes/l10n.php on line 804 and defined in /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-includes/l10n/class-wp-translation-controller.php:87 Stack trace: #0 /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-includes/l10n.php(804): WP_Translation_Controller->set_locale(NULL) #1 /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-includes/l10n.php(960): load_textdomain('default', '/home/clients/f...', NULL) #2 /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-content/plugins/polylang/src/olt-manager.php(75): load_default_textdomain(NULL) #3 /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-includes/class-wp-hook.php(355): PLL_OLT_Manager->load_textdomains('de') #4 /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-includes/class-wp-hook.php(377): WP_Hook->apply_filters(NULL, Array) #5 /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-includes/plugin.php(523): WP_Hook->do_action(Array) #6 /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-content/plugins/polylang/src/frontend/choose-lang.php(137): do_action('pll_language_de...', 'de', Object(PLL_Language)) #7 /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-content/plugins/polylang/src/frontend/choose-lang-url.php(34): PLL_Choose_Lang->set_language() #8 /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-content/plugins/polylang/src/frontend/frontend.php(134): PLL_Choose_Lang_Url->init() #9 /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-content/plugins/polylang/src/class-polylang.php(280): PLL_Frontend->init() #10 /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-content/plugins/polylang/src/class-polylang.php(224): Polylang->init_context('PLL_Frontend', Object(PLL_Model)) #11 /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-includes/class-wp-hook.php(353): Polylang->init('') #12 /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-includes/class-wp-hook.php(377): WP_Hook->apply_filters(NULL, Array) #13 /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-includes/plugin.php(523): WP_Hook->do_action(Array) #14 /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-settings.php(630): do_action('plugins_loaded') #15 /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-config.php(108): require_once('/home/clients/f...') #16 /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-load.php(50): require_once('/home/clients/f...') #17 /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-blog-header.php(13): require_once('/home/clients/f...') #18 /home/clients/f157941a13f3c901fdf9f34367121533/web/index.php(17): require('/home/clients/f...') #19 {main} thrown in /home/clients/f157941a13f3c901fdf9f34367121533/web/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 /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-includes/l10n.php on line 804 and defined in /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-includes/l10n/class-wp-translation-controller.php:87 Stack trace: #0 /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-includes/l10n.php(804): WP_Translation_Controller->set_locale(NULL) #1 /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-includes/l10n.php(960): load_textdomain('default', '/home/clients/f...', NULL) #2 /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain() #3 [internal function]: WP_Fatal_Error_Handler->handle() #4 {main} thrown in /home/clients/f157941a13f3c901fdf9f34367121533/web/wp-includes/l10n/class-wp-translation-controller.php on line 87