Fatal error: Uncaught Error: Interface "PhpOffice\PhpSpreadsheet\Writer\IWriter" not found in /home/romafi/cofortest/php/php-spreadsheet/src/PhpSpreadsheet/Writer/BaseWriter.php:5 Stack trace: #0 {main} thrown in /home/romafi/cofortest/php/php-spreadsheet/src/PhpSpreadsheet/Writer/BaseWriter.php on line 5