Unfortunately I wasn't able to reproduce the problem. I created a small sample web site with a route for the default page, but when I upload a file everything works correctly and I didn't receive an error. Could you take a look at the attached web site and see if I missed something.
If I did, please modify the sample so that it reproduces the issue (or attache a runnable version of your own project) and open a support ticket, where you can attach the project and send it back to me, so that I can investigate the issue locally.
the Telerik team
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