Having problems with gmod server.

I do not know if this is the right place to post but yeah. So recently i was trying to make a nutscript server, but it wont load in the gamemode it says its not excisting, i have looked on tons and tons of youtube videos and i have made a nutscript server before. Have not encountered this before if someone is good with nutscript or just helping with theese stuffs overall feel free to write!

Tanks.