K2 Management does not load

Topic

K2 Management only displays a blank page. 
 

A network trace from the browser shows an HTTP error code of 404 on some requests but not all. From Failed Request Trace logs, it was determined that these requests were actually failing with an HTTP error code of 404.7. According to Microsoft, this means that the requested file extension is not allowed.

Instructions 

1. On IIS Manager, go to Sites > {Your K2 Site} > Runtime
2. Under the Features view, select 'Request Filtering'
3. On the Actions panel on the right, click on 'Edit Feature Settings'
4. Check the following option: 'Allow unlisted file name extensions'  
5. Click on OK
6. Perform an IISRESET

Additional Information

How to enable Failed Request Tracing on IIS