Spawn Protection Addon creates alot of lua errors

Hello everyone. I’m running a Gmod Server that is on the Internet list and I want to add a spawn protection on gm_flatgrass but it creates alot of lua errors in the console and I can still see through walls. If anyone can help me solve this it would be much appreciated. Here is the proof:

[editline]16th August 2016[/editline] that’s the program I’ve installed

You have ulx installed?

also it seems to be 3 years old so it could just be broken

I have ulx installed and also a friend of mine owns a server and he still uses this mod and he said it works fine for him.

If all else fails someone recently made an up to date spawn protection addon and posted it on fp.