When I try and preview an excel, word or powerpoint file, it loads for a while then gives me the error: "Sorry, an error has occured. Download"
Is there any reason for this? Advice would be appreciated.
What preview-server are you using?
I'm not quite sure what you are referring to. Could you please elaborate?
To preview files you need to install and configure a preview server that renders the files.
Have a look in the documentation here: