The app was unable to navigate an iframe to %s because of the following error: %s. To handle navigation errors, we recommend ...

The app was unable to navigate an iframe to %s because of the following error: %s. To handle navigation errors, we recommend including a file named msapp-error.html in the root of the package. When a navigation error occurs in an iframe, the app navigates to the msapp-error.html page and passes the error details as query string parameters.