Desktop Word not displaying SPO folders on Open and Save As

Hi

In desktop Word when I try Open or Save As I get screen as below ie SPO Sites entry is there but no folders are displayed and it says 'There are no sites to show right now'.

However if I try Browse and then paste the site url in the Open or Save As file dialog then I can get to the SPO files and folders. As users are moving from on-premises file server they wont be thrilled to have to paste the site url manually.

How can I get the desktop Word to display the SPO files/folders in the first place?

Thanks

Regards