CLIENT_ERROR: authorization failed for primary source and source version - amazon-web-services

Question

I opened a free AWS account to learn and created an Administrator user group and user in IAM for myself.
I am following a tutorial "Automating your API testing with AWS CodeBuild, AWS CodePipeline, and Postman."
I am getting the error CLIENT_ERROR: authorization failed for primary source and source version in the DOWNLOAD_SOURCE phase of the Build transition in CodePipeline.
I followed the directions in an earlier post at AWS CodeBuild failed CLIENT_ERROR: authorization failed for primary source and source version with no success.
I added and attached a policy for connection-permissions in my service role as directed like so:
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": "codestar-connections:UseConnection",
"Resource": "insert connection ARN here"
}
]
}
Later, I changed the Action above to
"codepipeline:GetPipelineState"
I added and attached a policy for GitPull like so:
{
"Action": [
"codecommit:GitPull"
],
"Resource": "*",
"Effect": "Allow"
},
I have disconnected and reconnected my connection to GitHub and also tried creating a new personal access token with no success.
I have tried changing my S3 to public and Allow with
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "PublicReadGetObject",
"Effect": "Allow",
"Principal": "*",
"Action": "s3:GetObject",
"Resource": "arn:aws:s3:::yourbucketname/*"
}
]
}
I also tried updating my node in the source code to 16.18.0.
I am stuck. The resources I have found keep pointing me to the same AWS page I mentioned. I don't know what else to do. I would appreciate any help.
My repo is located at https://github.com/venushofler/my-aws-codepipeline-codebuild-with-postman.git

Answer 1

The answer to the above was to add a default set of access permissions to my users, groups, and roles in my account. I found documentation at https://docs.aws.amazon.com/codebuild/latest/userguide/setting-up.html which in part stated, "To add a default set of CodeBuild access permissions to an IAM group or IAM user, choose Policy Type, AWS Managed, and then do the following:
To add full access permissions to CodeBuild, select the box named AWSCodeBuildAdminAccess, choose Policy Actions, and then choose Attach. "
This worked to allow the Build and Deploy stage to succeed.