I'm trying to install a new magento 2.4.5 store by CLI using this command:

composer create-project --repository-url=https://repo.magento.com/ magento/project-community-edition:2.4.5

Ok this install correctly, but when i run the setup:install command, it returns this error:

enter image description here

The same error happens when i run "php bin/magento cache:flush" and others commands. What could it be? any help is appreciated.

setup:install command:

bin/magento setup:install --base-url=http://loja245.local --base-url-secure=https://loja245.local --db-host= --db-name=magento --db-user=user --db-password=pass --admin-firstname=admin --admin-lastname=admin [email protected] --admin-user=user --admin-password=pass --language=pt_BR --currency=BRL --timezone=America/Sao_Paulo --use-rewrites=1 --search-engine=elasticsearch7 --elasticsearch-host= --elasticsearch-port=9200

I'm using PHP 8.1, MariaDB 10.4, mysql 8.0. Just like the adobe system requirements says.

2 Answers 2


The error message indicates Fiber::getCurrent() method is undefined, the Fiber class has been available since PHP 8.1, so make sure you are running at least PHP 8.1.

I see you mentioned you are using PHP 8.1 but could you double-check by running this command:

php -v

  • It's running on PHP 8.1.0-dev. Apr 24, 2023 at 19:34
  • I'm not sure PHP 8.1.0-dev contains Fiber class or not but since it has a vulnerability ('User-Agentt' Remote Code Execution). You should update your PHP version to at least 8.1.
    – Tu Van
    Apr 24, 2023 at 19:39
  • 1
    And you had this error so we can assume PHP 8.1.0-dev does not have Fiber class yet.
    – Tu Van
    Apr 24, 2023 at 19:42

try removing composer.lock file and re run composer install it will fix the issue.

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