Cannot read properties of undefined (reading 'allowedTenants')

> [!IMPORTANT]
> **PLEASE DO NOT CREATE ISSUES RELATED TO MANAGED DEVELOPER PORTAL IN THIS REPOSITORY**. Issues related to "Managed developer portal" will be closed automatically. Managed developer portal issues should be created directly in Azure Support + Troubleshooting in Azure portal. Contact Azure support (or) submit a post [on Stack Overflow](http://aka.ms/apimso). Feature requests can be raised [on the Azure Feedback Forum](https://aka.ms/apimwish).

Every self-hosted developer bug report should have precise description and reproduction steps; console traces (or) source code references are appreciated.

## Bug description

Issue with publishing the selfhsoted website

## Reproduction steps

1. Simply follow the document https://learn.microsoft.com/en-us/azure/api-management/developer-portal-self-host
2. Run npm run publish to publish the website locally
3. See error below
Error: Unable to complete publishing. Error: Unable to complete pages publishing. Error: Unable to publish page "Sign in": Error: Unable to render page "Sign in - Microsoft Azure API Management - developer portal": Error: Unable to render page: TypeError: Cannot read properties of undefined (reading 'allowedTenants')
4. Content not published correctly under dist/website folder.

## Expected behavior

Run npm run should be able to Publish the portal locally and the content is published to the dist/website folder.

## Is self-hosted portal?

Yes
> [!WARNING]
> "Managed developer portal issues" will be closed automatically. See above for more details.

## Release tag or commit SHA (if using self-hosted version)

Release 2.34

## API Management service name

apim-one-shailesh

## Environment

- Operating system: [e.g., iOS]
- Browser: [e.g., Google Chrome, Safari]
- Version: [e.g., 22]

## Additional context

Issue seems with allowedTenants variable under signinSocialViewModelBinder.ts file
Fix add the null check here > const tenants = aadIdentityProvider?.allowedTenants || [];

Start in signinSocialViewModelBinder.ts, where the issue identifies the allowedTenants access, and reproduce the failure with npm run publish using the self-hosted portal instructions. Trace the Sign in page rendering path and verify the publishing command completes without the TypeError and populates dist/website with the portal content.

Written by the indexing model from the issue text.