Fatal error: Uncaught TypeError: Argument 1 passed to WP_Translation_Controller::set_locale() must be of the type string, null given, called in /var/www/html/wp-includes/l10n.php on line 804 and defined in /var/www/html/wp-includes/l10n/class-wp-translation-controller.php:87 Stack trace: #0 /var/www/html/wp-includes/l10n.php(804): WP_Translation_Controller->set_locale(NULL) #1 /var/www/html/wp-includes/l10n.php(960): load_textdomain('default', '/var/www/html/w...', NULL) #2 /var/www/html/wp-content/plugins/polylang/include/olt-manager.php(75): load_default_textdomain(NULL) #3 /var/www/html/wp-includes/class-wp-hook.php(326): PLL_OLT_Manager->load_textdomains('ru') #4 /var/www/html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #5 /var/www/html/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #6 /var/www/html/wp-content/plugins/polylang/frontend/choose-lang.php(112): do_action('pll_language_de...', 'ru', Object(PLL_Language)) #7 /var/www/html/wp-content/plugins/polylang/frontend/choose-lang-u in /var/www/html/wp-includes/l10n/class-wp-translation-controller.php on line 87

Fatal error: Uncaught TypeError: Argument 1 passed to WP_Translation_Controller::set_locale() must be of the type string, null given, called in /var/www/html/wp-includes/l10n.php on line 804 and defined in /var/www/html/wp-includes/l10n/class-wp-translation-controller.php:87 Stack trace: #0 /var/www/html/wp-includes/l10n.php(804): WP_Translation_Controller->set_locale(NULL) #1 /var/www/html/wp-includes/l10n.php(960): load_textdomain('default', '/var/www/html/w...', NULL) #2 /var/www/html/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain() #3 [internal function]: WP_Fatal_Error_Handler->handle() #4 {main} thrown in /var/www/html/wp-includes/l10n/class-wp-translation-controller.php on line 87