I\'ve added Mini Profiler through NuGet and though in a really simple project works lovely, this is a big and existing project, and of course that I
This is a known issue with certain configurations of IIS.
The workaround is to ensure the UrlRoutingModule handles all the mini profiler includes in your web.config:
There are 2 open tickets on this issue at the moment:
In a future version, to avoid the issue, we will probably serve our includes extensionless.