In Lobby reports, you have the option of doing popup charts to show graphs of the information listed. If these charts are just showing lines and what look like loading circles, then you can do the following to make them work correctly:

1. Open up the Web.config in the portal install directory.

2. Search for httpHandlers.

3. Add this tag under the httpHandlers tag:

<add path="ChartImage.axd" verb="*" type="Telerik.Web.UI.ChartHttpHandler, Telerik.Web.UI, Version=2016.1.113.45, Culture=neutral, PublicKeyToken=121fae78165ba3d4" validate="false" />

4. Search for <handlers>

5. Add this tag under the handlers tag:

<add name="ChartImage_axd" verb="*" preCondition="integratedMode" path="ChartImage.axd" type="Telerik.Web.UI.ChartHttpHandler" />

6. Save the web.config file.