Missing vendor Folder - Githubissues

The vendor is missing in this repository leading to error:

PHP Fatal error: Uncaught Error: Class 'Illuminate\Foundation\Application' not found in /home/vyruss/click/employee-mgmt-laravel5.4-adminlte/bootstrap/app.php:14 Stack trace:

0 /home/vyruss/click/employee-mgmt-laravel5.4-adminlte/artisan(18): require_once()

1 {main}

thrown in /home/vyruss/click/employee-mgmt-laravel5.4-adminlte/bootstrap/app.php on line 14

I pasted a vendor folder into the offline repo. Still, Another error was prompted;

**_

In excel.php line 182:

Class 'PHPExcel_Shared_Font' not found

_**

hoadv / employee-mgmt-laravel5.4-adminlte

Missing vendor Folder #20

0 /home/vyruss/click/employee-mgmt-laravel5.4-adminlte/artisan(18): require_once()

1 {main}