( ! ) Fatal error: Uncaught Error: Class "PhpOffice\PhpSpreadsheet\Calculation\Engineering\ConvertBase" not found in C:\wamp64\www\spatie\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Calculation\Engineering\ConvertHex.php on line 8
( ! ) Error: Class "PhpOffice\PhpSpreadsheet\Calculation\Engineering\ConvertBase" not found in C:\wamp64\www\spatie\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Calculation\Engineering\ConvertHex.php on line 8
Call Stack
#	Time	Memory	Function	Location
1	0.0485	397856	{main}( )	...\ConvertHex.php:0