Missing Mods?

I’m having a little problem with some mods for gmod…

All of my vehicle related mods DISAPPEAR when I play ONLY in multiplayer, for example if i made a local server.

But in Single Player…they’re all there.

I don’t get it…they used to work in multiplayer before…is this a problem with the mod itself? the game? should I reinstall the mods?

On your local server, or a public server?

Check to make sure the vehicles have the lua files that are generally called something like client or something… idk… Sorry chap.