Duplicate Lesson in Rise Course Not Working

Hi,

I've started my own discussion but not yet got a response so adding here. Both myself and a colleague are collaborators (with admin role) on several courses, but when we right click the courses and click duplicate it's starting to create a new course but then get's stuck saying "Processing course..." 

We are both working in different locations so it's not a network issue. Any idea what can be causing this?  We've only noticed this problem today. Previously we have been able to duplicate courses with no problem. 

Please see screenshot showing "Processing course..."  - would be fine if it actually did process the course, but waiting several minutes nothing happens. From previously using this, it's normally almost instant!

Any help gratefully received.

Thanks.

Julian