08 Conditional formatting 2

20:19:43 Create new Spreadsheet object
20:19:43 Set document properties
20:19:43 Add some data
20:19:43 Add conditional formatting
20:19:43 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