Known Issue: 500 Internal server error when registering the K2 Five for SharePoint app
KB003578
PRODUCTK2 Five
There is a known issue where you get a 500: Internal Server Error when you run the registration wizard for the K2 Five for SharePoint app.
Issue
If you use a browser other than Internet Explorer 11, when trying to run the K2 Five for SharePoint app registration wizard, you get a 500: Internal Server Error and cannot continue.
Resolution
Use Internet Explorer 11 to run the K2 Five for SharePoint registration wizard.