Fatal error: Uncaught Error: Class 'Matrix\Operators\Operator' not found in /home/junior47895/public_html/aulavirtual/AulaVirtual_22Apr/lib/phpspreadsheet/vendor/markbaker/matrix/classes/src/Operators/DirectSum.php:8 Stack trace: #0 {main} thrown in /home/junior47895/public_html/aulavirtual/AulaVirtual_22Apr/lib/phpspreadsheet/vendor/markbaker/matrix/classes/src/Operators/DirectSum.php on line 8