08 Conditional formatting 2

03:58:49 Create new Spreadsheet object
03:58:49 Set document properties
03:58:49 Add some data
03:58:49 Add conditional formatting
03:58:49 Duplicate the conditional formatting across a range of cells

Fatal error: Class 'XMLWriter' not found in /home/bitrix/ext_www/retender.ru/bitrix/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/XMLWriter.php on line 5