Fatal error: Uncaught Error: Interface "PHPStan\Rules\Rule" not found in /var/www/html/upload/PhpSpreadsheet-master/vendor/phpstan/phpstan-phpunit/src/Rules/PHPUnit/ClassCoversExistsRule.php:20 Stack trace: #0 {main} thrown in /var/www/html/upload/PhpSpreadsheet-master/vendor/phpstan/phpstan-phpunit/src/Rules/PHPUnit/ClassCoversExistsRule.php on line 20