Fatal error: Class 'Illuminate\Support\ServiceProvider' not found in /var/www/html/dev/spa/vendor/laravel/framework/src/Illuminate/Mail/MailServiceProvider.php on line 9

Call Stack:
    0.0011     259464   1. {main}() /var/www/html/dev/spa/vendor/laravel/framework/src/Illuminate/Mail/MailServiceProvider.php:0