Keep running in to this error: Bad argument #2 to 'random' (interval is empty). How can I fix this?

So, I know that this type of question has been answered but none of that helped me!! :(

Here is the error: bad argument #2 to 'random' (interval is empty)

The reason is that I am making an SCP game with my friend, and for SCP-173, I need a random tp script. What I have so far is a specified grid on where it can move.

Here is the script:

-- // Developed By BabyDevil285 \\ --

-- // Variables

local scp = script.Parent
local torso = scp.Torso
local hum = scp.Humanoid
local movementgrid = workspace.SCP_173_MovementGrid
local scpXmovement = math.random(-565, -595)
local scpZmovement = math.random(148, 188)

-- // Functions

local function Slide()
    torso.Position = Vector3.new(scpXmovement, 0, scpZmovement)
end

-- // Slide Event

while true do
    wait(math.random(4, 17))
    Slide()
end

-- // Kill Event

-- Soon.

The line of error: 9

Please help!!