( ! ) Deprecated: PHPExcel_Writer_Excel2007_StringTable::writeRichText(): Implicitly marking parameter $objWriter as nullable is deprecated, the explicit nullable type must be used instead in C:\wamp64\www\crop_db\libs\phpoffice\PHPExcel\Writer\Excel2007\StringTable.php on line 150

( ! ) Deprecated: PHPExcel_Writer_Excel2007_StringTable::writeRichText(): Implicitly marking parameter $pRichText as nullable is deprecated, the explicit nullable type must be used instead in C:\wamp64\www\crop_db\libs\phpoffice\PHPExcel\Writer\Excel2007\StringTable.php on line 150

( ! ) Deprecated: PHPExcel_Writer_Excel2007_StringTable::writeRichTextForCharts(): Implicitly marking parameter $objWriter as nullable is deprecated, the explicit nullable type must be used instead in C:\wamp64\www\crop_db\libs\phpoffice\PHPExcel\Writer\Excel2007\StringTable.php on line 232

( ! ) Fatal error: Uncaught Error: Class "PHPExcel_Writer_Excel2007_WriterPart" not found in C:\wamp64\www\crop_db\libs\phpoffice\PHPExcel\Writer\Excel2007\StringTable.php on line 36
( ! ) Error: Class "PHPExcel_Writer_Excel2007_WriterPart" not found in C:\wamp64\www\crop_db\libs\phpoffice\PHPExcel\Writer\Excel2007\StringTable.php on line 36
Call Stack
#	Time	Memory	Function	Location
1	0.0471	372832	{main}( )	...\StringTable.php:0