Rendering Exception

Rendering Exception

I am using the Configuration Wizard to add Departments. I had previously set them up under the default settings and discovered it was not working. I then changed the site name and started linking the Departments with the sitename which sorted that problem, however, the names in the department list now show up as [Rendering Exception], the information inside each entry is correct and will works correctly in the template, but the list of departments all show up as [Rendering Exception] for each entry in the list. I thought at first it might be because I had already set up these departments under default, but I got the same error when trying a new department.
 
Can you tell me why this is happening and have I done something wrong? How can I fix it?
 
 

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