( ! ) Deprecated: PHPExcel_Writer_Excel2007_Chart::writeChart(): Implicitly marking parameter $pChart as nullable is deprecated, the explicit nullable type must be used instead in C:\wamp64\www\crop_db\libs\phpoffice\PHPExcel\Writer\Excel2007\Chart.php on line 46

( ! ) Deprecated: PHPExcel_Writer_Excel2007_Chart::_writeTitle(): Implicitly marking parameter $title as nullable is deprecated, the explicit nullable type must be used instead in C:\wamp64\www\crop_db\libs\phpoffice\PHPExcel\Writer\Excel2007\Chart.php on line 133

( ! ) Deprecated: PHPExcel_Writer_Excel2007_Chart::_writeLegend(): Implicitly marking parameter $legend as nullable is deprecated, the explicit nullable type must be used instead in C:\wamp64\www\crop_db\libs\phpoffice\PHPExcel\Writer\Excel2007\Chart.php on line 180

( ! ) Deprecated: PHPExcel_Writer_Excel2007_Chart::_writePlotArea(): Implicitly marking parameter $xAxisLabel as nullable is deprecated, the explicit nullable type must be used instead in C:\wamp64\www\crop_db\libs\phpoffice\PHPExcel\Writer\Excel2007\Chart.php on line 235

( ! ) Deprecated: PHPExcel_Writer_Excel2007_Chart::_writePlotArea(): Implicitly marking parameter $yAxisLabel as nullable is deprecated, the explicit nullable type must be used instead in C:\wamp64\www\crop_db\libs\phpoffice\PHPExcel\Writer\Excel2007\Chart.php on line 235

( ! ) Deprecated: PHPExcel_Writer_Excel2007_Chart::_writePlotSeriesValues(): Optional parameter $dataType declared before required parameter $pSheet is implicitly treated as a required parameter in C:\wamp64\www\crop_db\libs\phpoffice\PHPExcel\Writer\Excel2007\Chart.php on line 1339

( ! ) Deprecated: PHPExcel_Writer_Excel2007_Chart::_writeLayout(): Implicitly marking parameter $layout as nullable is deprecated, the explicit nullable type must be used instead in C:\wamp64\www\crop_db\libs\phpoffice\PHPExcel\Writer\Excel2007\Chart.php on line 1487

( ! ) Fatal error: Uncaught Error: Class "PHPExcel_Writer_Excel2007_WriterPart" not found in C:\wamp64\www\crop_db\libs\phpoffice\PHPExcel\Writer\Excel2007\Chart.php on line 35
( ! ) Error: Class "PHPExcel_Writer_Excel2007_WriterPart" not found in C:\wamp64\www\crop_db\libs\phpoffice\PHPExcel\Writer\Excel2007\Chart.php on line 35
Call Stack
#	Time	Memory	Function	Location
1	0.0585	421952	{main}( )	...\Chart.php:0