( ! ) Fatal error: Uncaught Error: Class 'Matrix\Operators\Operator' not found in /var/www/html/invoice/vendor/markbaker/matrix/classes/src/Operators/DirectSum.php on line 8
( ! ) Error: Class 'Matrix\Operators\Operator' not found in /var/www/html/invoice/vendor/markbaker/matrix/classes/src/Operators/DirectSum.php on line 8
Call Stack
#	Time	Memory	Function	Location
1	0.0010	398488	{main}( )	.../DirectSum.php:0