Fatal error: Uncaught Error: Interface "Fidry\CpuCoreCounter\Finder\CpuCoreFinder" not found in /var/www/html/upload/PhpSpreadsheet-master/vendor/fidry/cpu-core-counter/src/Finder/EnvVariableFinder.php:21 Stack trace: #0 {main} thrown in /var/www/html/upload/PhpSpreadsheet-master/vendor/fidry/cpu-core-counter/src/Finder/EnvVariableFinder.php on line 21