Я следую инструкции https://github.com/rapidwebltd/php-google-contacts-v3-api. Просто запустите composer require rapidwebltd/php-google-contacts-v3-api, но появляется ошибка:
Using version ^2.0 for rapidwebltd/php-google-contacts-v3-api
./composer.json has been updated
Root package 'rapidwebltd/php-google-contacts-v3-api' cannot require itself in its composer.json
Did you accidentally name your root package after an external package?
Не работает?