Possible problems/solutions: The fact that you cannot see your character screen might mean that your character is wearing something with a sprite that your Ragnarok does not recognize. Try going to the control panel and clicking "Problems", and click "reset look".
Then, please get the newest version of kRO and Sakray [1213] and update it fully. We have a lot of new custom items that might error you.
If after following both of those suggestions, you're still having problems, post here and let us know.