aws amplify codegen - Language swift not supported

Question

Currently working on an iOS SwiftUI Project in combination with AWS Amplify. After a reinstall of amplify cli the amplify pull command stopped producing the swift code for my models.

Using the command amplify codegen I get the error Language swift not supported.

I can't explain why this is happening, before the reinstall it worked perfectly fine.

.graphqlconfig.yml 

projects:   
  placeholder:     
    schemaPath: graphql/schema.json     
    includes:
       - graphql/**/*.graphql     
    excludes:
       - ./amplify/**
    extensions:
       amplify:
         codeGenTarget: swift
         generatedFileName: API.swift
         docsFilePath: graphql
extensions:
  amplify:
    version: 3

I tried to reconfigure codegen with amplify configure codegen but it only shows languages typescript, flow and javascript ... not swift.

Thanks for your help.