Fatal error: Uncaught Error: Interface "App\Export\Spreadsheet\Writer\WriterInterface" not found in /home/palabrebel/www/kimai/src/Export/Spreadsheet/Writer/BinaryFileResponseWriter.php:16 Stack trace: #0 {main} thrown in /home/palabrebel/www/kimai/src/Export/Spreadsheet/Writer/BinaryFileResponseWriter.php on line 16