Hi,

 I followed the following page and installed the Episerver.ContentDeliveryApi package 2.11 on Episerver cms 11.15.0.  I am getting 404 when I try to access sitedefinition url or any other API content url. Here is what I did so far. I followed the instructions on this page https://world.episerver.com/documentation/developer-guides/content-delivery-api/getting-started/

1) I installed the following packages when installing EpiServer.ContentDeliveryApi package. I installed version 2.11 as that is version compatible with the Episerver cms version 11.15 that we have.

 <package id="EPiServer.ContentDeliveryApi" version="2.11.0" targetFramework="net471" />
  <package id="EPiServer.ContentDeliveryApi.Cms" version="2.11.0" targetFramework="net471" />
  <package id="EPiServer.ContentDeliveryApi.Core" version="2.11.0" targetFramework="net471" />
  <package id="EPiServer.ContentDeliveryApi.OAuth" version="2.6.0" targetFramework="net471" />

2) Set Access rights for the contentapiread Read access for root item and its descendants.

3) Created the following initialization class as shown 

[InitializableModule]
[ModuleDependency(typeof(ServiceContainerInitialization), typeof(ContentApiCmsInitialization))]
public class ContentApiInitialization : IConfigurableModule
{
	public void ConfigureContainer(ServiceConfigurationContext context)
	{
		context.Services.AddTransient<RoutingEventHandler, CustomContentApiRoutingEventHandler>();
		

		// set minimumRoles to empty to allow anonymous calls (for visitors to view site in view mode)
		context.Services.Configure<ContentApiConfiguration>(config =>
		{
			config.Default()
				.SetMinimumRoles(string.Empty)
				.SetSiteDefinitionApiEnabled(true);
		});
	}

        public void Initialize(InitializationEngine context)
        {
            
        }

        public void Uninitialize(InitializationEngine context)
        {
            
        }
}

4) It showed  CustomContentApiRoutingEventHandler is not found in the project. Hence searched and found this article and used this as the class as shown below:

https://world.episerver.com/forum/developer-forum/-Episerver-75-CMS/Thread-Container/2020/9/customcontentapiroutingeventhandler-namespace-not--found/

public class CustomContentApiRoutingEventHandler : RoutingEventHandler
    {
        public CustomContentApiRoutingEventHandler(
            IContentRouteEvents routeEvents,
            ServiceAccessor<HttpContextBase> httpContextAccessor,
            ContentApiRouteService contentApiRouteService)
            : base(routeEvents, httpContextAccessor, contentApiRouteService)
        {
        }

        // If language does not exists in the routing context, we return ContentLanguage.PreferredCulture as default language
        protected override string GetLanguage(SegmentContext routingContext, HttpRequestBase request)
        {
            var language = routingContext.Language ?? routingContext.ContentLanguage ?? ContentLanguage.PreferredCulture.Name;

            return language;
        }
    }

5) Then after compilation, tried to access the following urls

http://www.mywebsite.com/api/site/?language=en
http://www.mywebsite.com/api/episerver/v2.0/content/5/

But both of these returned 404. Am I missing something or made any mistake in trying to get the ContentDeliveryAPI? Could someone let me know How I can debug and see whats happening and how I can correct this issue with the ContentDeliveryApi.

Thanks in advance