Why does this script always print "nil" instead of the body parts?

im trying to make a thing like when u click a part it scans the players which r touching the part, i wanted to test out GetTouchingParts() so i made it so whatever items are touching the part, it prints their name. when i go inside the part and click scan, it just prints nil 4 times here is the script

local clickdetector = script.Parent.ClickDetector
local scanpart = game.Workspace.SCANPART
local touchingparts

script.Parent.ClickDetector.MouseClick:Connect(function()
    wait(1.5)
    touchingparts = scanpart:GetTouchingParts()
    print(touchingparts[1])
    print(touchingparts[2])
    print(touchingparts[3])
    print(touchingparts[4])
end)