What's Broken?

[eluser]WanWizard[/eluser]
If this is your level of understanding, perhaps you should consider some additional development/PHP training?

The message is very clear. You have called a function defined in the URL helper with the wrong type of parameter.
Simply looking in the file mentioned, at the line mentioned, would have told you want you did wrong.
I checked, and it's pretty obvious, but I leave it to you as a training excercise.