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Uh-oh- something went wrong! There is no such reviewer

I am using the .net annotation library, following the instruction from this article:

I created a MVC5 project and run on IIS EXPRESS, platform is Microsoft Visual Studio,but when I get to the website ,an error window just pop up, says: "Uh-oh, something went wrong! There is no such reviewer." And the annotation tool bar is not showing either.

Screen shot:

Here is my project

Thank you



We are sorry to hear that you have such issue. We checked and fixed your project, now it works fine for us. The reason of the issue was that you specified wrong user name in your HomeController. By default (anonym user) GroupDocs.Annotation uses user name. To set different user name for annotation you should use Get parameter “un”. For example your URL could be – http://localhost:7015/?un=testuser. In that case user name will be “testuser”

Please download fixed project here -

If you will have more questions please feel free to contact us.