The script functions fine. Despite line 91 being highlighed reading ClickDetector is not a valid member of unionoperation it doesn't actually seem to impair the model. It works as intended. HOWEVER, I have like 40 of these scripts floating around in 40 different models, so when ever I need to test the game's mechanics for another model, I have to exit out of 40 bloody scripts. Its getting really annoying really fast.
function onClicked()
script.Parent.Parent.L1.Script.Disabled = false
script.Parent.Parent.L1.Transparency = 0.7
script.Parent.Parent.L1.CanCollide = true
script.Parent.Parent.L2.Script.Disabled = false
script.Parent.Parent.L2.Transparency = 0.7
script.Parent.Parent.L2.CanCollide = true
script.Parent.Parent.L3.Script.Disabled = false
script.Parent.Parent.L3.Transparency = 0.7
script.Parent.Parent.L3.CanCollide = true
script.Parent.Parent.L4.Script.Disabled = false
script.Parent.Parent.L4.Transparency = 0.7
script.Parent.Parent.L4.CanCollide = true
script.Parent.Parent.L5.Script.Disabled = false
script.Parent.Parent.L5.Transparency = 0.7
script.Parent.Parent.L5.CanCollide = true
script.Parent.Parent.L6.Script.Disabled = false
script.Parent.Parent.L6.Transparency = 0.7
script.Parent.Parent.L6.CanCollide = true
script.Parent.Parent.L7.Script.Disabled = false
script.Parent.Parent.L7.Transparency = 0.7
script.Parent.Parent.L7.CanCollide = true
script.Parent.Parent.L8.Script.Disabled = false
script.Parent.Parent.L8.Transparency = 0.7
script.Parent.Parent.L8.CanCollide = true
script.Parent.Parent.L9.Script.Disabled = false
script.Parent.Parent.L9.Transparency = 0.7
script.Parent.Parent.L9.CanCollide = true
script.Parent.Parent.L10.Script.Disabled = false
script.Parent.Parent.L10.Transparency = 0.7
script.Parent.Parent.L10.CanCollide = true
script.Parent.Parent.L11.Script.Disabled = false
script.Parent.Parent.L11.Transparency = 0.7
script.Parent.Parent.L11.CanCollide = true
script.Parent.Parent.L12.Script.Disabled = false
script.Parent.Parent.L12.Transparency = 0.7
script.Parent.Parent.L12.CanCollide = true
script.Parent.Parent.L13.Script.Disabled = false
script.Parent.Parent.L13.Transparency = 0.7
script.Parent.Parent.L13.CanCollide = true
script.Parent.Parent.L14.Script.Disabled = false
script.Parent.Parent.L14.Transparency = 0.7
script.Parent.Parent.L14.CanCollide = true
script.Parent.Parent.L15.Script.Disabled = false
script.Parent.Parent.L15.Transparency = 0.7
script.Parent.Parent.L15.CanCollide = true
script.Parent.Parent.L16.Script.Disabled = false
script.Parent.Parent.L16.Transparency = 0.7
script.Parent.Parent.L16.CanCollide = true
script.Parent.Parent.L17.Script.Disabled = false
script.Parent.Parent.L17.Transparency = 0.7
script.Parent.Parent.L17.CanCollide = true
script.Parent.Parent.L18.Script.Disabled = false
script.Parent.Parent.L18.Transparency = 0.7
script.Parent.Parent.L18.CanCollide = true
script.Parent.Parent.L19.Script.Disabled = false
script.Parent.Parent.L19.Transparency = 0.7
script.Parent.Parent.L19.CanCollide = true
script.Parent.Parent.L20.Script.Disabled = false
script.Parent.Parent.L20.Transparency = 0.7
script.Parent.Parent.L20.CanCollide = true
script.Parent.Parent.L21.Script.Disabled = false
script.Parent.Parent.L21.Transparency = 0.7
script.Parent.Parent.L21.CanCollide = true
script.Parent.Parent.L22.Script.Disabled = false
script.Parent.Parent.L22.Transparency = 0.7
script.Parent.Parent.L22.CanCollide = true
script.Parent.Parent.L23.Script.Disabled = false
script.Parent.Parent.L23.Transparency = 0.7
script.Parent.Parent.L23.CanCollide = true
script.Parent.Parent.L24.Script.Disabled = false
script.Parent.Parent.L24.Transparency = 0.7
script.Parent.Parent.L24.CanCollide = true
script.Parent.Parent.L25.Script.Disabled = false
script.Parent.Parent.L25.Transparency = 0.7
script.Parent.Parent.L25.CanCollide = true
script.Parent.Parent.L26.Script.Disabled = false
script.Parent.Parent.L26.Transparency = 0.7
script.Parent.Parent.L26.CanCollide = true
script.Parent.Parent.L27.Script.Disabled = false
script.Parent.Parent.L27.Transparency = 0.7
script.Parent.Parent.L27.CanCollide = true
script.Parent.Parent.F1.Transparency = 0
script.Parent.Parent.F1.CanCollide = true
script.Parent.Parent.F2.Transparency = 0
script.Parent.Parent.F2.CanCollide = true
script.Parent.Parent.F3.Transparency = 0
script.Parent.Parent.F3.CanCollide = true
end
script.Parent.ClickDetector.MouseClick:connect(onClicked)

4 comments
This......this is why we have loops, please learn some basic control structures first https://developer.roblox.com/articles/Roblox-Coding-Basics-Loops
^
And as for the error itself, you don't have a ClickDetector in whatever script.Parent is
Please do a for loop