( ! ) Fatal error: Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Writer\Xls\BIFFwriter" not found in /var/www/html/gestion-escuelas/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Worksheet.php on line 57
( ! ) Error: Class "PhpOffice\PhpSpreadsheet\Writer\Xls\BIFFwriter" not found in /var/www/html/gestion-escuelas/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xls/Worksheet.php on line 57
Call Stack
#	Time	Memory	Function	Location
1	0.0067	1178880	{main}( )	.../Worksheet.php:0