Fatal error: Class 'Illuminate\Support\ServiceProvider' not found in /var/www/html/dev/spa/vendor/laravel/framework/src/Illuminate/Encryption/EncryptionServiceProvider.php on line 5

Call Stack:
    0.0002     234552   1. {main}() /var/www/html/dev/spa/vendor/laravel/framework/src/Illuminate/Encryption/EncryptionServiceProvider.php:0