Fatal error: Uncaught Error: Class "Box\Spout\Writer\WriterAbstract" not found in C:\xampp\htdocs\dfs_lead_generator_old\vendor\box\spout\src\Spout\Writer\CSV\Writer.php:15 Stack trace: #0 {main} thrown in C:\xampp\htdocs\dfs_lead_generator_old\vendor\box\spout\src\Spout\Writer\CSV\Writer.php on line 15