Network Failure when Creating new app

[iamalper]

Environment information

System:
  OS: Windows 11 10.0.26100
  CPU: (16) x64 13th Gen Intel(R) Core(TM) i5-13500H
  Memory: 4.92 GB / 15.70 GB
Binaries:
  Node: 20.18.3 - C:\Program Files\nodejs\node.EXE
  Yarn: undefined - undefined
  npm: 11.1.0 - C:\Program Files\nodejs\npm.CMD
  pnpm: undefined - undefined
NPM Packages:
  @aws-amplify/auth-construct: 1.6.0
  @aws-amplify/backend: 1.14.1
  @aws-amplify/backend-ai: Not Found
  @aws-amplify/backend-auth: 1.5.0
  @aws-amplify/backend-cli: 1.4.11
  @aws-amplify/backend-data: 1.4.0
  @aws-amplify/backend-deployer: 1.1.18
  @aws-amplify/backend-function: 1.12.2
  @aws-amplify/backend-output-schemas: 1.4.0
  @aws-amplify/backend-output-storage: 1.1.4
  @aws-amplify/backend-secret: 1.1.6
  @aws-amplify/backend-storage: 1.2.4
  @aws-amplify/cli-core: 1.3.0
  @aws-amplify/client-config: 1.5.7
  @aws-amplify/data-construct: 1.15.0
  @aws-amplify/data-schema: 1.18.0
  @aws-amplify/deployed-backend-client: 1.5.1
  @aws-amplify/form-generator: 1.0.4
  @aws-amplify/model-generator: 1.0.12
  @aws-amplify/platform-core: 1.6.3
  @aws-amplify/plugin-types: 1.8.0
  @aws-amplify/sandbox: 1.2.11
  @aws-amplify/schema-generator: 1.2.7
  aws-amplify: 6.13.2
  aws-cdk: 2.1002.0
  aws-cdk-lib: 2.181.1
  typescript: 5.8.2
No AWS environment variables
No CDK environment variables

Describe the bug

When i try to create a new app with Gthub Provider, i get "Network Failure" and i can't select any repository. I'm having this issue for a week. I didn't used AWS or Amplify before.

• I tired to Uninstall Amplify app from my Github profile, then tired to create Amplify app again.
• I can reproduce with private browsing. I use Firefox if matters.
• I disabled browser tracking protection.

These are XHR requests i see in dev tools when i got "Network Failure".

There is setting for "AWS Amplify (eu-central-1)" app in my Github

Reproduction steps

1. Create a new app, select Github provider then next.

2. Github popup shows for a second then closes.

3. Get the "Network Failure". There is nothing in the repository list. Clicking "Update Github Permissions" has no effect.