Fatal error: Uncaught Error: Class "Fidry\CpuCoreCounter\Finder\ProcOpenBasedFinder" not found in /var/www/html/upload/PhpSpreadsheet-master/vendor/fidry/cpu-core-counter/src/Finder/LscpuPhysicalFinder.php:28 Stack trace: #0 {main} thrown in /var/www/html/upload/PhpSpreadsheet-master/vendor/fidry/cpu-core-counter/src/Finder/LscpuPhysicalFinder.php on line 28