User management page on console throws error when adding user to a group

[ykethan]

Environment information

System:
  OS: macOS 15.2
  CPU: (8) arm64 Apple M1
  Memory: 267.70 MB / 16.00 GB
  Shell: /bin/zsh
Binaries:
  Node: 20.5.0 - ~/.nvm/versions/node/v20.5.0/bin/node
  Yarn: 1.22.22 - /opt/homebrew/bin/yarn
  npm: 9.8.0 - ~/.nvm/versions/node/v20.5.0/bin/npm
  pnpm: 9.15.2 - ~/Library/pnpm/pnpm
NPM Packages:
  @aws-amplify/auth-construct: 1.5.1
  @aws-amplify/backend: 1.13.0
  @aws-amplify/backend-auth: 1.4.2
  @aws-amplify/backend-cli: 1.4.7
  @aws-amplify/backend-data: 1.4.0
  @aws-amplify/backend-deployer: 1.1.14
  @aws-amplify/backend-function: 1.12.0
  @aws-amplify/backend-output-schemas: 1.4.0
  @aws-amplify/backend-output-storage: 1.1.4
  @aws-amplify/backend-secret: 1.1.5
  @aws-amplify/backend-storage: 1.2.4
  @aws-amplify/cli-core: 1.2.2
  @aws-amplify/client-config: 1.5.5
  @aws-amplify/deployed-backend-client: 1.5.0
  @aws-amplify/form-generator: 1.0.3
  @aws-amplify/model-generator: 1.0.12
  @aws-amplify/platform-core: 1.6.0
  @aws-amplify/plugin-types: 1.8.0
  @aws-amplify/sandbox: 1.2.9
  @aws-amplify/schema-generator: 1.2.6
  aws-amplify: 6.12.1
  aws-cdk: 2.176.0
  aws-cdk-lib: 2.176.0
  typescript: 5.7.3
No AWS environment variables
No CDK environment variables

Describe the bug

When adding a user created using social providers such as google or login with amazon to a group the console throws

Note: there are no errors when using Cognito console to add this user to a new group

Reproduction steps

1. Signup with a social provider
2. create a new group using user management on console say Admin
3. select a user -> Group membership
4. then select the Admin group from dropdown
5. observe error