Note: If you character bugged with the FP items in (like, getting disconected while still wearing those) and you get the Inventory Error message when you try to unequip it, do the following:
Buy again the items that are giving out the error, equip, go back to Server Channel and head all the way back to your inventory. You will have doubles now, I know, but at last you will be able to use Cytriik normally after that.