Page does not exist?

Question

Classmates

Good afternoon, please tell me how to solve this problem.
I created an application on classmates, for a competition, to collect classes for photos, I see this application in my office, but when I try to enter it, I write:
This page is not on OK.RU
But there are many others
What does this mean, how to solve this problem?
Thanks in advance.

Answer 1

This problem is related to the fact that an invalid URL was specified as the application link, which is why it cannot load in the iframe.
Nevertheless, the application is there, you can, for example, get into its settings if you scroll the page.