Fatal error: Uncaught Error: Interface 'PhpOffice\PhpSpreadsheet\Writer\IWriter' not found in /home/dvidiv74/public_html/comp-life/PhpSpreadsheet-master/src/PhpSpreadsheet/Writer/BaseWriter.php:5 Stack trace: #0 {main} thrown in /home/dvidiv74/public_html/comp-life/PhpSpreadsheet-master/src/PhpSpreadsheet/Writer/BaseWriter.php on line 5