Why the URL in your beacon does not work?

Why the URL in your beacon does not work?
I left your default url: http://go.est.be/
But when I scan with Scanner Beacon URL is changed http://go.est.be/EST course the page is not found.
I tried to change but always adds URL after / EST

You mentioned that you verified URL in the beacon with “Scanner Beacon URL”. What is this app? Where I can get it?