Keynote can't connect to iCloud
I have a deck I've created and shared on icloud and been working collaboratively in for a week. This morning, keynote says it can't connect. The collaborate button has a warning icon inside it.
When I hit that button I get this:
I've dropped files into my local icloud folder, and they sync ok. The issue is only in Keynote.
MacBook Pro 16″, macOS 10.15