Weld?

My weld tool doesn’t work anymore! Why? Do you have the same problem or is it just me?

EDIT

As a matter of fact, none of my stick tools are working! Not my nail either!

sir, this has happened in the past so there is nothing to be worried about you ether A.have a error in your system or B. have a virus you might have gotten a error from downloading too many addons and can delete them bye going into your gmod directory deleting gmod and running it again on steam to make a new game,