Perma-view problem

Perma-view problem

I am having a recurring problem with perma-links, which results in this error message in Firefox:

An error has occured. It has been reported to Zoho Creator support. We will look into this issue .
Sorry for the inconvenience caused.

In Explorer it's the HTTP 500 error: The website cannot display the page.

There are no frames involved. Cookies are allowed.

Going back onme step, what happens is that I set up an app, then get a permaview for it and create an HTML link to this. Then I share the app with the person whom I want to see it. They get this error when they click on the link.

I have logged in as that person and they CAN access the app, at exactly the same URL.

Pretty bizarre, and incredibly frustrating (again and again).

Does anyone know enough to help?