IdentityServer 3.0–HTTP 404 for /assets resources
IdentityServer 3.0 (https://identityserver.github.io/Documentation/) works as an OAuth provider, especially useful when you want to roll your own authentication.
However should you mimic the samples incorrectly, you may get the following screen, where the /assets resources are not found.
Because ID3 packages everything in a DLL, you will need to ensure that runAllManagedModulesForAllRequests (RAMMR) is enabled in web.config
Once you have enabled RAMMR, simply save web.config and reload the page and viola