Hi Mary,
Thanks for the suggestions.
- I think we are currently using a Windows 10 based server for Moodle but I am using Windows 7 to access it.
- We don't have any gradebook plugins installed at the moment.
- GIT hasn't been updated with the latest version yet. I will try and do that later. GIT doesn't work on my machine here so it's difficult to keep it up to date.
- In the CLEAN theme the files export perfectly. This is what's odd as there are not too many fundamental differences between AARDVARK and CLEAN other than the CSS and the header/footer layouts. I think I need to start unpicking them to see what may be causing the issue but it's like looking for a needle in a haystack without knowing what might be causing it.