Fatal error: Uncaught Error: Class 'Illuminate\Support\ServiceProvider' not found in /opt/lampp/htdocs/us/vendor/iwasherefirst2/laravel-multimail/src/MultiMailServiceProvider.php:7 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/us/vendor/iwasherefirst2/laravel-multimail/src/MultiMailServiceProvider.php on line 7