fix render mode of api test

MyBlazorApp/Components/Pages/Weather.razor

@@ -1,6 +1,7 @@
 @page "/weather"
 @using MyBlazorApp.Services
 @inject WeatherForecastService ForecastService
+@rendermode InteractiveServer
 
 <h3>Weather Forecast ☀️</h3>
 
@@ -45,9 +46,9 @@ else
     private IEnumerable<WeatherForecast> forecasts;
     private bool isLoading = true;
 
-    protected override async Task OnInitializedAsync()
+    protected override void OnInitialized()
     {
-        await LoadForecasts();
+        LoadForecasts();
     }
 
     private async Task LoadForecasts()