Unable to assume specified IAM Role when deploying with AWS Amplify using GitHub

Question

I was trying to deploy my application with AWS Amplify using github and I got this error :

2020-07-03T10:39:32.225Z [ERROR]: !!! Unable to assume specified IAM Role. Please ensure the selected IAM Role has sufficient permissions and the Trust Relationship is configured correctly.
2020-07-03T10:39:32.348Z [INFO]: # Starting environment caching...
2020-07-03T10:39:32.348Z [INFO]: # Environment caching completed
Terminating logging...

And this is the trust policy:

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Principal": {
        "Service": "amplify.amazonaws.com"
      },
      "Action": "sts:AssumeRole"
    }
  ]
}

heyheyhei · Accepted Answer · 2021-02-10 09:29:04Z

3

Please ensure sts endpoint status of your region is Active. You can check in IAM > Account settings > Security Token Service (STS).

If still not work, you may try to change service endpoint in your trust policy from "amplify.amazonaws.com" to "amplify.<your-region>.amazonaws.com", which works for me. Amplify Endpoint: https://docs.aws.amazon.com/general/latest/gr/amplify.html

answered Feb 10, 2021 at 9:29

heyheyhei

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Rob Villeneuve · Accepted Answer · 2025-07-29 00:06:25Z

0

This took me a while to find.

My Amplify build/deployments were failing with the error message "Unable to assume specified IAM Role". The issue was the AWS Amplify Github App lost access to my Amplify Project's GitHub Repository.

Fix: In your GitHub Org, go to Settings > GitHub Apps > AWS Amplify and choose Configure. Review the settings in the section Repository Access. In my case, I had to select the GitHub repository.

answered Jul 29 at 0:06

Rob Villeneuve

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