Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/eregistrandocom/public_html/vendor/phpoffice/phpspreadsheet/tests/PhpSpreadsheetTests/Reader/Html/HtmlCharsetTest.php:11 Stack trace: #0 {main} thrown in /home/eregistrandocom/public_html/vendor/phpoffice/phpspreadsheet/tests/PhpSpreadsheetTests/Reader/Html/HtmlCharsetTest.php on line 11