I keep on getting an error "Attention - Something went wrong" error when refreshing my product catalog in admin panel. Or sometimes it just keeps loading but no products are shown. After a few refreshes it usually goes away, but appears again soon.
It started around the time I started to duplicate products (2 store views).
Any ideas how to get rid of the error or how to debug it?
EDIT: now, after 2 days of adding products, it totally broke down and I can't get the list anymore.
