Clicking on the "Materials" button in the server window's effects tab creates a lua error

Go to the server window and click on effects then click on the Materials button and you'll get this error:
```lua
[StormFox 2] RunConsoleCommand: Command is blocked! (+mat_texture_list)
  1. DoClick - lua/stormfox2/functions/cl_menu_sv.lua:1007
   2. unknown - lua/vgui/dlabel.lua:237
```