PAS on AWS using tf: using Credentials.yml tf plan gives 403

[quixoticmonk]

• Terraform version : 0.11.13
• pcf tf template : latest
• Issue : Using credentials.yml with the AWS access credentials displays the following error.

`$ ./terraform.exe plan
Refreshing Terraform state in-memory prior to plan...
The refreshed state will be used to calculate this plan, but will not be
persisted to local or remote state storage.

Error: Error refreshing state: 1 error(s) occurred:

• provider.aws: error validating provider credentials: error calling sts:GetCallerIdentity: InvalidClientTokenId: The security token included in the request is invalid.
  status code: 403, request id: #######`

I was able to resolve it with the AWS credentials exported using the EXPORT command and removing the credentials.yml file. Is there a certain version of tf which is needed?