Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /var/www/html/20240806162226/vendor/merkeleon/php-cryptocurrency-address-validation/tests/TestCase.php:8 Stack trace: #0 {main} thrown in /var/www/html/20240806162226/vendor/merkeleon/php-cryptocurrency-address-validation/tests/TestCase.php on line 8