Errors , Erros and more Errors

i have lots of errors on my gmod
like with the stargate mod
when i try to spawn the gate overloader it spawns but has this error
entities/gate_overloader/init.lua:124: attempt to call method ‘RegisterEntity’ (a nil value)

then when i try to attach a zpm to it this happens
autorun/RDBeam_NetVars.lua:1569: attempt to index field ‘Entity’ (a nil value)

and when i try to start it this happens , a charging up sound plays but nothing else happens
entities/gate_overloader/init.lua:447: attempt to call method ‘JamRemoteGate’ (a nil value)

and when i delete the overloader this error appears
entities/gate_overloader/init.lua:124: attempt to call method ‘unRegisterEntity’ (a nil value)

ill have a youtube video up soon in the meantime any help would be appreciated

try reinstalling gmod and then installing the latest versions of each addon

i really dont want to reinstall gmod
cause i dont have much qouta