This is an issue caused by microsoft office's settings.
To resolve, in word:
Click File
Click options
Click Save on the menu on the left side
Tick "Don't show the Backstage when opening or saving files with keyboard shortcuts"
Try generate the doc again, it should now work.
If you are still experiencing the issue, please ask a question in the MyAccess Portal Digital Assistant and ask to "Speak to a human" to be put through directly to our support team.