I recently installed ULX/ULib from the latest releases section on the downloads page. I extracted both addons and put them both in the addons folder. When I tested my server on a Windows machine, it worked just fine. But, when I put it on Linux (Ubuntu), no commands worked, the menu wouldn't open, and my HUD was glitching out. When I removed ULX and ULib, the HUD worked just fine. I have never had a problem with ULX before on a Windows machine.