'Available at' showing when URL field empty

Hi,

I am using a style created by my university and having trouble correctly editing the ‘report’ template. It still shows ‘Available at’ even though the URL field is empty. Can anyone help?

This is what it currently looks like:

Author (Year) Title. Place Published: Institution|, (Report No. Report Number)|. Pages pp|.  Available at: URL (Accessed: Access Date)|.