App fails to deploy with Amplify 1-click

[brianz]

I followed the directions for the Amplify 1-click deployment. The Backend build failed.

The relevant parts of the Amplify Build console show:

2022-06-30T17:12:58.779Z [INFO]: CREATE_IN_PROGRESS AmplifyResourcesPolicy AWS::IAM::Policy      Thu Jun 30 2022 17:12:54 GMT+0000 (Coordinated Universal Time)
  CREATE_IN_PROGRESS LambdaFunction         AWS::Lambda::Function Thu Jun 30 2022 17:12:54 GMT+0000 (Coordinated Universal Time)
  CREATE_IN_PROGRESS AmplifyResourcesPolicy AWS::IAM::Policy      Thu Jun 30 2022 17:12:55 GMT+0000 (Coordinated Universal Time) Resource creation Initiated
  CREATE_IN_PROGRESS LambdaFunction         AWS::Lambda::Function Thu Jun 30 2022 17:12:56 GMT+0000 (Coordinated Universal Time) Resource creation Initiated
2022-06-30T17:13:03.775Z [INFO]: 
2022-06-30T17:13:03.776Z [INFO]: CREATE_FAILED LambdaFunction AWS::Lambda::Function Thu Jun 30 2022 17:13:00 GMT+0000 (Coordinated Universal Time) 
    Resource handler returned message: "User: arn:aws:sts::111111111111:assumed-role/amplifyconsole-backend-role/BuildSession is not authorized to perform: lambda:PutFunctionConcurrency on resource: 
    arn:aws:lambda:us-west-2:111111111111:function:S3Trigger984fb593-devb because no identity-based policy allows the lambda:PutFunctionConcurrency 
    action (Service: Lambda, Status Code: 403, Request ID: 3a417a78-3416-4ab9-a589-0e6945fe3947)" (RequestToken: 1a65c44a-93cb-86c6-b612-4a48af0dfe0f, HandlerErrorCode: AccessDenied)
2022-06-30T17:13:18.778Z [INFO]: 
2022-06-30T17:13:18.781Z [INFO]: CREATE_COMPLETE AmplifyResourcesPolicy                                                 AWS::IAM::Policy           Thu Jun 30 2022 17:13:13 GMT+0000 (Coordinated Universal Time)
                                 CREATE_FAILED   amplify-photoshare-devb-170520-functionS3Trigger984fb593-19MV1K7RNRV4I AWS::CloudFormation::Stack Thu Jun 30 2022 17:13:14 GMT+0000 (Coordinated Universal Time) The following resource(s) failed to create: [LambdaFunction].
2022-06-30T17:13:28.887Z [INFO]: 
2022-06-30T17:13:28.888Z [INFO]: CREATE_FAILED functionS3Trigger984fb593 AWS::CloudFormation::Stack Thu Jun 30 2022 17:13:28 GMT+0000 (Coordinated Universal Time) 
    Embedded stack arn:aws:cloudformation:us-west-2:111111111111:stack/amplify-photoshare-devb-170520-functionS3Trigger984fb593-19MV1K7RNRV4I/d0a04fc0-f897-11ec-abb8-02cf258d1d13 
   was not successfully created: The following resource(s) failed to create: [LambdaFunction].

[charliejllewellyn]

I also have this issue. The workaround is to update the amplifyconsole-backend-role with an additional policy allowing "lambda:PutFunctionConcurrency". Would be good to get the guide updated to include this step.