Fatal error: Uncaught Error: Class 'PhpOffice\PhpSpreadsheet\Shared\Date' not found in /home/uralbox/public_html/vendor/phpoffice/phpspreadsheet/tests/data/Calculation/Statistical/SLOPE.php:29 Stack trace: #0 {main} thrown in /home/uralbox/public_html/vendor/phpoffice/phpspreadsheet/tests/data/Calculation/Statistical/SLOPE.php on line 29