Fatal error: Uncaught TypeError

I have a problem. After I upgraded WordPress to 6.7, polylang caused the following error. I stopped polylang and the webpage opened normally. The theme is divi. How to fix it?

Fatal error: Uncaught TypeError: WP_Translation_Controller::set_locale(): Argument #1 ($locale) must be of type string, null given, called in /www/wwwroot/globalartour.com/wp-includes/l10n.php on line 803 and defined in /www/wwwroot/globalartour.com/wp-includes/l10n/class-wp-translation-controller.php:87 Stack trace: #0 /www/wwwroot/globalartour.com/wp-includes/l10n.php(803): WP_Translation_Controller->set_locale() #1 /www/wwwroot/globalartour.com/wp-includes/l10n.php(959): load_textdomain() #2 /www/wwwroot/globalartour.com/wp-settings.php(641): load_default_textdomain() #3 /www/wwwroot/globalartour.com/wp-config.php(102): require_once(‘…’) #4 /www/wwwroot/globalartour.com/wp-load.php(50): require_once(‘…’) #5 /www/wwwroot/globalartour.com/wp-blog-header.php(13): require_once(‘…’) #6 /www/wwwroot/globalartour.com/index.php(17): require(‘…’) #7 {main} thrown in /www/wwwroot/globalartour.com/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 /www/wwwroot/globalartour.com/wp-includes/l10n.php on line 803 and defined in /www/wwwroot/globalartour.com/wp-includes/l10n/class-wp-translation-controller.php:87 Stack trace: #0 /www/wwwroot/globalartour.com/wp-includes/l10n.php(803): WP_Translation_Controller->set_locale() #1 /www/wwwroot/globalartour.com/wp-includes/l10n.php(959): load_textdomain() #2 /www/wwwroot/globalartour.com/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain() #3 [internal function]: WP_Fatal_Error_Handler->handle() #4 {main} thrown in /www/wwwroot/globalartour.com/wp-includes/l10n/class-wp-translation-controller.php on line 87