Class Carbon\Carbon not found

Question

I recently added a package to my Laravel 4 site and now anything that uses Eloquent (or at least Eloquent with any reference to date/time) is showing a 500 error that states

Answer 1

Not saying this is work for you, but those are steps that usually fix Laravel, when the problem is not on your source code, of course:

cd /your/application/dir

rm bootstrap/compiled.php

rm -rf vendor

composer install --no-dev