As described in the title, the app simply stops working after some time.
The application itself is a simple, one page form that pulls data from a webapi on another webserver by use of the Sharepoint WebProxy and displays that data using knockout.js. The environment and the Sharepoint Server (On-Premise, same domain as my Dev Machine) are configured correctly - supposedly - as described in
Configure an environment for apps for SharePoint (SharePoint 2013)
I can develop, debug in VS, deploy and open the App directly on the Sharepoint Site.
But after a while, when opening the app again without having changed or redeployed anything it stops at this point in the redirect process:
https://sharepointurl/_layouts/15/appredirect.aspx?instance_id=<some-guid>
and shows the "This page cannot be displayed" message. The Sharepoint Site still works.
There are no errors in the eventlog. Most of the time I can fix this by restarting the IIS service completely on which the Sharepoint Site resides. But sometimes even that doesnt work.
What could be the problem? Any Idea?
Update: The error is not consistent in that it may occur for user A but not for user B and even that can exchange after some time, so that the user B sees the error and user A can use the App.
Update: The error only occurs in IE 11 and doesn't happen when using Google Chrome.
Update: It seems as if Sharepoint 2013 Apps do not work with Internet Explorer 11, which I was using. As we had other issues with IE 11 and Reporting I downgraded my development machine to IE 10 and now it works.
Update: This had nothing to do with IE 11 either. The error eventually returned.
