Provide help for users if their search doesn't work for some reason

[JasonThomasData]

If a search doesn't work, we currently don't do anything.
We need some way to catch those (code errors or user input playing up or offline).
We need a way to give the user something useful after catching the error.

[JasonThomasData]

We should create some unit tests to put the project's components under some stress. Do we need doctors' details first?