The error message ""configuring Terraform AWS Provider: no valid credential sources for Terraform AWS Provider found"" indicates that Terraform is unable to find valid AWS credentials to authenticate with AWS [3]. This error can occur due to various reasons such as incorrect AWS credentials, incorrect profile name, or incorrect configuration of the AWS provider.

Here are some steps to resolve this issue:

1. Ensure that the AWS CLI is properly configured on the system where Terraform is being executed [5]. You can run `aws configure` to configure the AWS CLI with your AWS access key ID and secret access key.

2. Ensure that the AWS credentials file exists and contains valid credentials. The default location for the AWS credentials file is `~/.aws/credentials` [4].

3. Ensure that the AWS profile name specified in the Terraform AWS provider configuration matches the profile name in the AWS credentials file [4]. For example, if your AWS credentials file contains a profile named `myprofile`, you should specify `myprofile` as the profile name in the Terraform AWS provider configuration.

4. Ensure that the AWS provider is correctly configured in your Terraform configuration file. The AWS provider configuration should include the `region` and `profile` parameters [1]. For example:

provider ""aws"" {
  region  = ""us-west-2""
  profile = ""myprofile""
}

5. If you are using an EC2 instance to run Terraform, ensure that the instance has an IAM role attached with the necessary permissions to access AWS resources [3].

If none of the above steps resolve the issue, you can refer to the AWS provider documentation [1] or seek help from the Terraform community forums [2][3][7].