Media page not showing on wordpress afte u/g 5.6

Hi all

My web hosting have upgraded my site to wp 5.6. But I’ve just gone in to edit and the media tab shows a blank page. I’d include a screenshot – but basically it’s the page where you can select media etc.

THe site uses smush but I’ve done the ‘deactivate plugins’ and checked – still the problem persists.

Mark