Constraints problem on character. Have any idea how to fix it?

I have made a Ragdoll script, which creates attachments and "Ball in socket" constrains between the character's limbs and torso. When the character dies, all of its Welds breaks except the constrains, turning it into a ragdoll

The problem is that It only works in studio mode. When I tested It online, the character limbs breaks appart just like a normal death. Do anyone know how to fix this?

Also, I tried using that GUI which displays script errors in-game, and nothing pops out

In any case, heres the part of my script

function joint(part1,part2,pos1,pos2,stable)
    local attach0 = Instance.new("Attachment",part1)
    attach0.Position = pos1
    local attach1 = Instance.new("Attachment",part2)
    attach1.Position = pos2
    local socket = Instance.new("BallSocketConstraint",part1)
    socket.Attachment0 = attach0
    socket.Attachment1 = attach1

    if stable then
        socket.LimitsEnabled = true
        socket.UpperAngle = 0
        socket.TwistLimitsEnabled = true
        socket.TwistLowerAngle = 0
        socket.TwistUpperAngle = 0
    end

    local tab = {socket,attach0,attach1}
    return tab
end

local attachments = {
    joint(torso,rArm,Vector3.new(1.5,0.5,0),Vector3.new(0,0.5,0),false),
    joint(torso,lArm,Vector3.new(-1.5,0.5,0),Vector3.new(0,0.5,0),false),
    joint(torso,rLeg,Vector3.new(0.5,-1,0),Vector3.new(0,1,0),false),
    joint(torso,lLeg,Vector3.new(-0.5,-1,0),Vector3.new(0,1,0),false),
    joint(torso,fHead,Vector3.new(0,1,0),Vector3.new(0,-0.5,0),false)
}