Class 'Symfony\Component\EventDispatcher\Event' not found in Laravel/Lumen

Question

When Trying to install Rackspace package (composer require rackspace/php-opencloud), getting the following error Class 'Symfony\Component\EventDispatcher\Event' not found. I have installed symfony package but that could not worked out. Kindly help me out for this.

Answer 1

Try to install the required package

composer require symfony/event-dispatcher