All game servers will be down at 2:45 PM CT on November 26 to fix an issue with the Lucky Charm item. The item itself is working correctly, but once ended, players could no longer collect hero shards.
This fix is a temporary patch, and will require further work for the next client update. Due to this, you may experience an invalid loot error once when you have a Lucky Charm item expire. Restarting your game client will fix that issue.