Q:

Can not install annotations

I tried installing annotations for symfony. But I can not install it.
composer require annotations
I tried writing "composer require annotations"
-> https://save.jb-dev.eu/img/NWgZ7LPOv0.png
Does anyone have any idea what the problem might be?

A:

if you use Symfony flex 
composer require annotations

if you don't use Symfony Flex, add it to your composer.json file
or you can use this command
composer require sensio/framework-extra-bundle

