I currently cannot browse my SK inventory in steam which means I cannot trade with it via steam at all, a real shame, any advice?

To re-create the issue I do;

1. Steam > Community > Market
2. Select "Sell Item"
3. Select "Spiral knights"

The tab is then selected, the Spiral Knights logo appears, but the grid is visible with empty containers where items should be.

If I click on another game the tab contents changes to that game, then if I re-select "Spiral Knights" the tab loads with the message "You currently have 0 items in your Spiral Knights inventory".