Fatal error: Uncaught Error: Class "Assetic\Factory\Loader\BasePhpFormulaLoader" not found in C:\xampp\htdocs\electronica\vendor\symfony\assetic-bundle\Factory\Loader\AsseticHelperFormulaLoader.php:21 Stack trace: #0 {main} thrown in C:\xampp\htdocs\electronica\vendor\symfony\assetic-bundle\Factory\Loader\AsseticHelperFormulaLoader.php on line 21