Provider Class not found In ProviderRepository.php line 208

Issue is resolved by just follow these step. Go to your project > bootstrap->cache->config.php remove the provider and aliases from the cached array manually.

Easiest thing for me was to just delete the files in /bootstrap/cache/. Those will get regenerated automatically.

Ultimately, the fix that worked for me:

Delete the folder "vendor", and run composer install once again.

A more specific fix may have been possible, but this cleans things up nicely anyhow.

1. Run : composer update

2. Run : composer dump-autoload

It works for me with Laravel 8.x