Why wont this remotefunction work? no errors given, only works in studio

this is the invoke function within the server script. the remotefunction is being invoked whenever the camera lookvector changes

snippet of the code

script.Parent.OnServerInvoke = function() local camY = camera_.CoordinateFrame.lookVector.Y for joint,def in pairs(RIG) do joint.C0 = def.C0 * CFrame.Angles(def.Factor.XcamY, def.Factor.YcamY, def.Factor.Z*camY) joint.C1 = def.C1 end end

when i run this in studio, it works properly and my character's arms follow the camera on the Y axis, however, when i run it in a server the characters arms dont move. no errors given so im pretty lost