Fatal error: Uncaught Error: Class 'IWasHereFirst2\LaravelMultiMail\Tests\TestCase' not found in /opt/lampp/htdocs/us/vendor/iwasherefirst2/laravel-multimail/tests/Integration/MultiMailTest.php:11 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/us/vendor/iwasherefirst2/laravel-multimail/tests/Integration/MultiMailTest.php on line 11