Crash when using server items

Put the summary of the bug you're having here
When using server items, the game crashes.
What I expected to happen was...:
Describe what you thought should happen here
Server issues and/or my computer
What actually happened was...:
Describe what happened here
I don't have a clue.
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. Right click the item which is supposed to have an effect
3. The crash happens