Fatal error: Uncaught Error: Interface 'Illuminate\Contracts\Mail\Mailer' not found in /opt/lampp/htdocs/Insurance-Integration-prod/vendor/laravel/framework/src/Illuminate/Mail/Mailer.php:20 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/Insurance-Integration-prod/vendor/laravel/framework/src/Illuminate/Mail/Mailer.php on line 20