Me: Here’s the URL for the web service I’ve just deployed. I’ve set up users and permissions so just copy it into your browser and you should see a very similar system to what you’ve been trained on with all your data in there.

Customer: All I’m getting is a blank screen.

Much panicking and headscratching later…

Me: Waaaiiiiittt, did you press Return/Go after copying the URL?

Customer: That was not in the instructions.