Hi BENFARHAT,
The error is a permissions one, saying that your user should have one of these roles set in IAM policies: Owner, Editor, Service Account User role.
You need to go to the IAM UI in the project where you're trying to create the environment and check the roles that your user has, surely you don't have any of these previous ones. Ask the person in your organization that has the privileges to set IAM policies to give your user one of these roles.
I hope you can solve this problem
Regards
Matias