Thank you for reporting this issue.
It appears that you can get this error if you don't have the
URL Rewrite module installed for your IIS.
This is because the default Web.config that comes with the Xomega solution template has some URL rewrite rules under the <rewrite> element, which help you set a custom path to the Login page.
To resolve this issue you can try one of the following options:
- Remove the <rewrite> element from the Web.config, and set the path to the Login page in the App_Start/Startup.Auth.cs class instead, if needed.
- Download and install the URL Rewrite module for your IIS server.
Please let us know if these solutions work for you.