Garry'sMod Addon Crashing Singleplayer [HELP] [A.S.A.P]

Everytime I boot up into singleplayer, it crashes to desktop.

No errors, no pop-up, or has stopped working.

It just goes to desktop.

For one thing, I’ve tried validating.

I AM NOT REINSTALLING, EVER! So don’t say that if you are trying to help.

The thing is, disabling addons makes sandox work.

The other troubling thing is that it will work on other gamemodes, like, say, horror story will work with all addons, or Zombie Survival.

Help, ASAP?