( ! ) Deprecated: PHPExcel_Writer_Excel2007::__construct(): Implicitly marking parameter $pPHPExcel as nullable is deprecated, the explicit nullable type must be used instead in C:\wamp64\www\crop_db\libs\phpoffice\PHPExcel\Writer\Excel2007.php on line 131

( ! ) Deprecated: PHPExcel_Writer_Excel2007::setPHPExcel(): Implicitly marking parameter $pPHPExcel as nullable is deprecated, the explicit nullable type must be used instead in C:\wamp64\www\crop_db\libs\phpoffice\PHPExcel\Writer\Excel2007.php on line 435

( ! ) Fatal error: Uncaught Error: Class "PHPExcel_Writer_Abstract" not found in C:\wamp64\www\crop_db\libs\phpoffice\PHPExcel\Writer\Excel2007.php on line 36
( ! ) Error: Class "PHPExcel_Writer_Abstract" not found in C:\wamp64\www\crop_db\libs\phpoffice\PHPExcel\Writer\Excel2007.php on line 36
Call Stack
#	Time	Memory	Function	Location
1	0.0451	380816	{main}( )	...\Excel2007.php:0