Unbale to create investigation group

The error you're experiencing when trying to create an investigation group in CloudWatch Investigations could be due to several reasons:

1. Internal Server Error: This might be a temporary issue with the CloudWatch Investigations service. In such cases, you can try again later as these errors sometimes resolve themselves.

2. Insufficient Permissions: You may not have the necessary permissions to create an investigation group. To create an investigation group, you need to have the AIOpsConsoleAdminPolicy or AdministratorAccess IAM policy attached to your user or role, or similar permissions.

3. Explicit Deny in IAM Policy: There might be an explicit deny statement in an IAM policy that's preventing you from creating the investigation group. In IAM, deny statements always take precedence over allow statements.

To resolve this issue:

• Check your IAM permissions to ensure you have the necessary rights to create investigation groups
• Verify there are no explicit deny statements in your IAM policies that might be blocking this action
• Try again later if it might be a temporary service issue
• If the problem persists, contact AWS Support as suggested in the error message for more specific assistance with your account

This generic error message typically indicates that something unexpected happened during the request processing that requires AWS support intervention to diagnose and resolve.
Sources
CreateInvestigationGroup - CloudWatch investigations
UpdateInvestigationGroup - CloudWatch investigations
ClientError: An error occurred (AccessDeniedException) when calling the CreateInferenceComponent operation: | AWS re:Post