Fatal error: Cannot declare class WP_Ajax_Response, because the name is already in use in C:\home\site\wwwroot\wp-includes\class-wp-ajax-response.php on line 8

Fatal error: Uncaught Error: Class 'MO' not found in C:\home\site\wwwroot\wp-includes\l10n.php:653 Stack trace: #0 C:\home\site\wwwroot\wp-includes\l10n.php(742): load_textdomain('default', 'C:\\home\\site\\ww...') #1 C:\home\site\wwwroot\wp-includes\class-wp-fatal-error-handler.php(41): load_default_textdomain() #2 [internal function]: WP_Fatal_Error_Handler->handle() #3 {main} thrown in C:\home\site\wwwroot\wp-includes\l10n.php on line 653