Warning: Array to string conversion in /var/www/wp-includes/l10n.php on line 1043

Fatal error: Uncaught TypeError: WP_Translation_Controller::set_locale(): Argument #1 ($locale) must be of type string, array given, called in /var/www/wp-includes/l10n.php on line 799 and defined in /var/www/wp-includes/l10n/class-wp-translation-controller.php:87 Stack trace: #0 /var/www/wp-includes/l10n.php(799): WP_Translation_Controller->set_locale(Array) #1 /var/www/wp-includes/l10n.php(1046): load_textdomain('gd-system-plugi...', '/var/www/wp-con...', Array) #2 /var/www/wp-content/mu-plugins/gd-system-plugin.php(71): load_muplugin_textdomain('gd-system-plugi...', 'gd-system-plugi...') #3 /var/www/wp-content/mu-plugins/gd-system-plugin/includes/trait-singleton.php(29): WPaaS\Plugin->__construct() #4 /var/www/wp-content/mu-plugins/gd-system-plugin/includes/autoload.php(61): WPaaS\Plugin::load() #5 /var/www/wp-content/mu-plugins/gd-system-plugin.php(259): WPaaS\plugin() #6 /var/www/wp-settings.php(442): include_once('/var/www/wp-con...') #7 /var/www/wp-config.php(97): require_once('/var/www/wp-set...') #8 /var/www/wp-load.php(50): require_once('/var/www/wp-con...') #9 /var/www/wp-blog-header.php(13): require_once('/var/www/wp-loa...') #10 /var/www/index.php(17): require('/var/www/wp-blo...') #11 {main} thrown in /var/www/wp-includes/l10n/class-wp-translation-controller.php on line 87

Warning: Array to string conversion in /var/www/wp-includes/l10n.php on line 953

Fatal error: Uncaught TypeError: WP_Translation_Controller::set_locale(): Argument #1 ($locale) must be of type string, array given, called in /var/www/wp-includes/l10n.php on line 799 and defined in /var/www/wp-includes/l10n/class-wp-translation-controller.php:87 Stack trace: #0 /var/www/wp-includes/l10n.php(799): WP_Translation_Controller->set_locale(Array) #1 /var/www/wp-includes/l10n.php(953): load_textdomain('default', '/var/www/wp-con...', Array) #2 /var/www/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/wp-includes/l10n/class-wp-translation-controller.php on line 87