Class 'Illuminate\Cache\CacheServiceProvider' not found

I'm working on a laravel project with my Android phone.

I cleared junk files using a software and now I get error when trying to serve my project.

First I ran php artisan serve and got this error:

$ php artisan serve

In PackageManifest.php line 168:

  The /storage/emulated/0/web/tbcians/bootstrap
  /cache directory must be present and writable
  .

Then I created the cache directory and ran php artisan serve again and got another error:

$ php artisan serve

In ProviderRepository.php line 208:

  Class 'Illuminate\Cache\CacheServiceProvider'
   not found

How do I fix this?

I've tried running

$ composer update

and

$ composer update --no-scripts

but I'm still getting the error

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