Two similar problems in Game Manager:
1) Go to Catalog -> Containers
2) Press "New Container"
3) Press "Add to container"
=> There should be a list of items, but it's empty. Same with droptables tab. Currency tab works correctly.
This is pretty critical at the moment as we can't create new containers.
Second case:
1) Go to Rules, select an existing rule with Grant Items action
2) Press "Select items"
=> No list appears here either. Curiosly, when creating a new Rule with new Action this works. I haven't tested other combinations (existing rule, new action for example).
Maybe this is somehow related to the other bug I've reported where the rule is not able to add items to players.
Worth noting is that we have originally copied the catalog from another title using the API functions, and we are also using the API functions for updating/adding some of the catalog items.