Merci de ta réponse !!
Alors je suis actuellement en local sans utiliser wamp, etc..
Et voici mon .env :
# In all environments, the following files are loaded if they exist,
# the latter taking precedence over the former:
#
# * .env contains default values for the environment variables needed by the app
# * .env.local uncommitted file with local overrides
# * .env.$APP_ENV committed environment-specific defaults
# * .env.$APP_ENV.local uncommitted environment-specific overrides
#
# Real environment variables win over .env files.
#
# DO NOT DEFINE PRODUCTION SECRETS IN THIS FILE NOR IN ANY OTHER COMMITTED FILES.
#
# Run "composer dump-env prod" to compile .env files for production use (requires symfony/flex >=1.2).
# https://symfony.com/doc/current/best_practices/configuration.html#infrastructure-related-configuration
###> symfony/framework-bundle ###
APP_ENV=dev
APP_SECRET=ebed2ff4a26c070bdd2ddad64a1fe9a4
#TRUSTED_PROXIES=127.0.0.0/8,10.0.0.0/8,172.16.0.0/12,192.168.0.0/16
#TRUSTED_HOSTS='^localhost|example\.com$'
###< symfony/framework-bundle ###
###> symfony/mailer ###
# MAILER_DSN=smtp://localhost
###< symfony/mailer ###
###> doctrine/doctrine-bundle ###
# Format described at https://www.doctrine-project.org/projects/doctrine-dbal/en/latest/reference/configuration.html#connecting-using-a-url
# For an SQLite database, use: "sqlite:///%kernel.project_dir%/var/data.db"
# For a PostgreSQL database, use: "postgresql://db_user:db_password@127.0.0.1:5432/db_name?serverVersion=11"
# IMPORTANT: You MUST configure your db driver and server version, either here or in config/packages/doctrine.yaml
DATABASE_URL=mysql://root:root@127.0.0.1:3306/masuperagence?serverVersion=5.7
###< doctrine/doctrine-bundle ###
Tom Texier