( ! ) Fatal error: Uncaught Error: Class 'PhpOffice\PhpSpreadsheet\Writer\Xlsx\WriterPart' not found in /var/www/html/invoice/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xlsx/RelsRibbon.php on line 8
( ! ) Error: Class 'PhpOffice\PhpSpreadsheet\Writer\Xlsx\WriterPart' not found in /var/www/html/invoice/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Writer/Xlsx/RelsRibbon.php on line 8
Call Stack
#	Time	Memory	Function	Location
1	0.0001	397184	{main}( )	.../RelsRibbon.php:0