terraform instance-profile/master_profile" has no associated IAM Roles

1 error(s) occurred:
- aws_instance.master.2: Error launching source instance: InvalidParameterValue: IAM Instance Profile "arn:aws:iam::300835344128:instance-profile/master_profile" has no associated IAM Roles
status code: 400, request id: 2693153b-2c04-4d0a-97bb-74dc92ad555d

Terraform does not automatically rollback in the face of errors.
Instead, your Terraform state file has been partially updated with
any resources that successfully completed. Please address the error
above and apply again to incrementally change your infrastructure.

Start by locating the Terraform configuration for aws_instance.master.2 and the instance profile named master_profile, then reproduce the apply failure if the environment is available. Trace how the profile and its IAM role are defined; done means the profile has an associated role and the source instance launches successfully.

Written by the indexing model from the issue text.