Hi,
After updating from laravel 5.3 to 5.4, I encountered with an error in vendor. The error is:
Symfony\Component\Debug\Exception\FatalThrowableError: Call to undefined method Illuminate\Session\Store::set() in /var/www/ostadbank.com/vendor/laravel/framework/src/Illuminate/Support/Manager.php:137
All calls to the ->set() method should be changed to ->put(). Typically, Laravel applications would never call the set method since it has never been documented within the Laravel documentation. However, it is included here out of caution.