Hi,

we've recently gone live with an Umbraco 8.4.1 build and are still getting lots of requests for legacy urls (presumably because of search engines). We have many redirects in place, but also lots that we don't / can't redirect.

The issue we have is that many of these will result in server error (No physical template file was found for template xxx)

I found the following:

/something/else/ --> returns our custom 404 using the page specified in the umbracoConfig
/something/else/test/ --> this will throw No physical template file was found for template **else**

The other flavour of this is when requesting static files:

/something/else/test.html --> will throw this: [NullReferenceException: Object reference not set to an instance of an object.]
   Umbraco.Web.Runtime.<>c.<Compose>b__0_6(IFactory factory) in D:\a\1\s\src\Umbraco.Web\Runtime\WebInitialComposer.cs:116

We're using custom routing as detailed here: https://our.umbraco.com/documentation/reference/routing/custom-routes

What am I missing? :)