Fluxcp adding items in shop problem

[konzen002 0]

hello Im having trouble with adding items in the Item Shop of Fluxcp. Whenever i click add item, Im always receiving there message: 

 

"Cannot add an unknown item to the item shop"

[Mumbles 193]

If you're using a custom theme with Hercules FluxCP, you'll have to update your theme's item module manually. Refer to f3eed0e for these changes.