500 response code after authentication with custom IdP ( Azure AAD / Single Tenant )

I want to use a custom authentication for my Azure static web app. But after the login process, is the callback always a 500.

My staticwebapp.config.json looks like this

{
  "routes": [
    {
      "route": "/login",
      "rewrite": "/.auth/login/aad"
    },
    {
      "route": "/logout",
      "rewrite": "/.auth/logout"
    },
    {
      "route": "/.auth/login/twitter",
      "statusCode": "404"
    },
    {
      "route": "/.auth/login/github",
      "statusCode": "404"
    },
    {
      "route": "/*",
      "allowedRoles": ["authenticated"]
    }
  ],
  "responseOverrides": {
    "401": {
      "redirect": "/login",
      "statusCode": 302
    },
    "404": {
      "rewrite": "/404.html"
    }
  },
  "auth": {
    "identityProviders": {
      "azureActiveDirectory": {
        "registration": {
          "openIdIssuer": "https://login.microsoftonline.com/xxxx",
          "clientIdSettingName": "AAD_CLIENT_ID",
          "clientSecretSettingName": "AAD_CLIENT_SECRET"
        }
      }
    }
  }
}

My App Registration -> Authentication Settings

https://..myAppUrl../.auth/login/aad/callback

https://..myAppUrl../.auth/login/aad/

Some other have the same issue, maybe someone here has a solution ?

https://github.com/Azure/static-web-apps/issues/547