ASP.NET Handler Issue

If you are unable to login to the K2 Workspace (Mobile) app, and browsing to http://[yourk2serverinstance.com]/k2api/api/user/current results in a 404 error stating the item cannot be found, there may be an ASP.NET configuration issue.

Handlers for 'aspq-ISAPI', 'AXD-ISAPI', 'cshtm-ISAPI', 'cshtml-ISAPI' and 'ExtensionlessUrlHandler' (both 32 bit and 64 bit for each of them) as seen in the image below are missing, ASP.NET is not installed properly. (The handlers shown below are system-specific and your system may include other handlers. It also may not have some handlers such as ExtensionLessUrlHandler-Integrated-4.0.)

You can view the registered handlers by selecting the K2Api > Handler Mappings under the IIS section:

To resolve this issue