I can't spawn effects on my server

I dont know what info especcialy to give…
Server IP:
Can’t spawn effects
effects limit to 3
Nothing happens when you try to spawn effect but i think it sometimes load, but you cant see it… I dont see at least the green circle.
If you want some more info, tell me please.

Sounds like missing models or materials. Try running the server updater tool.

Already tried. Nothing happens.