Fatal error: Class 'Illuminate\Support\ServiceProvider' not found in /var/www/html/dev/spa/vendor/laravel/framework/src/Illuminate/Foundation/Providers/KeyGeneratorServiceProvider.php on line 6

Call Stack:
    0.0005     236488   1. {main}() /var/www/html/dev/spa/vendor/laravel/framework/src/Illuminate/Foundation/Providers/KeyGeneratorServiceProvider.php:0