Trados not detecting Office installation for live preview

Hi there,

I've got an up-to-date installation of Trados Studio 2021 and Office 365 but receive the following error message when trying to preview a Word file from the Preview pane: "Microsoft Office 2007 or later must be installed to preview Office files"

The strange thing is that it sometimes works and sometimes doesn't – and I've never been able to work out what suddenly made it work again.

Does anyone else see this error message sometimes?

Would be grateful for any tips!

Cheers,

Matt