Error to user AWS Glue and Glue crawler "Unable to add classifier"

If you are using an IAM user, you need to attach the appropriate IAM policy or policies to grant the necessary permissions.

• Open the AWS Management Console and navigate to the IAM service.
• Go to the "Users" section and find the IAM user you are using.
• Click on the user and navigate to the "Permissions" tab.
• Click on "Add permissions" and then select "Attach existing policies directly".
• Search for the policy AWSGlueServiceRole and select it.
• Click on "Next: Review" and then "Add permissions".

If your account is part of an AWS Organization, the root account actions could potentially be restricted by a Service Control Policy (SCP) set by the Organizations administrator. Additionally, please verify that your IAM permissions allow creating a Glue crawler, and check if any AWS Organizations service control policies (SCPs) may be restricting this action (if applicable).

In general, it is best practice not to use the root account for day-to-day tasks. Instead, I would recommend using IAM users, IAM roles, or AWS SSO users which allow you to implement least privilege access.