Blazor WASM API call with windows credentials - browser

Question

I have a problem with blazor WASM application (.NET6) and consuming an external API (ASP MVC Project).
The API expects windows authentication and CORS is enabled:
<httpProtocol>
<customHeaders>
<add name="Access-Control-Allow-Origin" value="*" />
<add name="Access-Control-Allow-Headers" value="Content-Type" />
<add name="Access-Control-Allow-Methods" value="GET,POST,PUT,DELETE,OPTIONS" />
<add name="Access-Control-Allow-Credentials" value="true" />
</customHeaders>
</httpProtocol>
My http GET request in blazor:
var request = new HttpRequestMessage(HttpMethod.Get, _testEndpoint);
request.SetBrowserRequestCredentials(BrowserRequestCredentials.Include);
//request.SetBrowserResponseStreamingEnabled(true);
request.SetBrowserRequestMode(BrowserRequestMode.NoCors);
var response = await _httpClient.SendAsync(request);
//response.EnsureSuccessStatusCode();
var result = await response.Content.ReadFromJsonAsync<MY_JSON_OBJECT>();
return result;
launchSettings.json:
{
"iisSettings": {
"windowsAuthentication": true,
"anonymousAuthentication": false,
"iisExpress": {
"applicationUrl": "http://localhost:33694",
"sslPort": 44350
}
},
"profiles": {
"MyProjectTest": {
"commandName": "Project",
"dotnetRunMessages": true,
"launchBrowser": true,
"inspectUri": "{wsProtocol}://{url.hostname}:{url.port}/_framework/debug/ws-proxy?browser={browserInspectUri}",
"applicationUrl": "http://localhost:7151;http://localhost:5151",
"environmentVariables": {
"ASPNETCORE_ENVIRONMENT": "Development"
}
},
"IIS Express": {
"commandName": "IISExpress",
"launchBrowser": true,
"inspectUri": "{wsProtocol}://{url.hostname}:{url.port}/_framework/debug/ws-proxy?browser={browserInspectUri}",
"environmentVariables": {
"ASPNETCORE_ENVIRONMENT": "Development"
}
}
}
}
The result is always that there is no content in the response and the status code = 0.
Error message: The input does not contain any JSON tokens. Expected the input to start with a valid JSON token, when isFinalBlock is true. Path: $ | LineNumber: 0 | BytePositionInLine: 0.
Can anyone help me here?