Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/uralbox/public_html/vendor/phpoffice/phpspreadsheet/tests/PhpSpreadsheetTests/Reader/HtmlTest.php:12 Stack trace: #0 {main} thrown in /home/uralbox/public_html/vendor/phpoffice/phpspreadsheet/tests/PhpSpreadsheetTests/Reader/HtmlTest.php on line 12